Vulnerability-Lookup

OPENSUSE-SU-2026:11315-1

Vulnerability from csaf_opensuse - Published: 2026-07-20 00:00 - Updated: 2026-09-17 17:15

Summary

libgit2-1_9-1.9.6-1.1 on GA media

Severity

Moderate

Notes

Title of the patch: libgit2-1_9-1.9.6-1.1 on GA media

Description of the patch: These are all security issues fixed in the libgit2-1_9-1.9.6-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-11315

CVE-2026-53583

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:libgit2-1_9-0:1.9.6-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-1_9-0:1.9.6-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-1_9-0:1.9.6-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-1_9-0:1.9.6-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-devel-0:1.9.6-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-devel-0:1.9.6-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-devel-0:1.9.6-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-devel-0:1.9.6-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-tools-0:1.9.6-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-tools-0:1.9.6-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-tools-0:1.9.6-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libgit2-tools-0:1.9.6-1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-53584

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 12 products, the same list as for CVE-2026-53583

Threats

Impact important

CVE-2026-53585

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 12 products, the same list as for CVE-2026-53583

Threats

Impact important

CVE-2026-53586

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 12 products, the same list as for CVE-2026-53583

Threats

Impact important

CVE-2026-53587

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 12 products, the same list as for CVE-2026-53583

Threats

Impact important

References

17 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-53583/	self
https://www.suse.com/security/cve/CVE-2026-53584/	self
https://www.suse.com/security/cve/CVE-2026-53585/	self
https://www.suse.com/security/cve/CVE-2026-53586/	self
https://www.suse.com/security/cve/CVE-2026-53587/	self
https://www.suse.com/security/cve/CVE-2026-53583	external
https://bugzilla.suse.com/1271698	external
https://www.suse.com/security/cve/CVE-2026-53584	external
https://bugzilla.suse.com/1271697	external
https://www.suse.com/security/cve/CVE-2026-53585	external
https://bugzilla.suse.com/1271696	external
https://www.suse.com/security/cve/CVE-2026-53586	external
https://bugzilla.suse.com/1271694	external
https://www.suse.com/security/cve/CVE-2026-53587	external
https://bugzilla.suse.com/1271695	external

JSON

To clipboard

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          "text": "libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verify_server_cert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GEN_IPADD branch when comparing an IP-literal host with a certificate IP SubjectAltName. OpenSSL builds reject matching IP addresses and accept mismatched IP addresses, allowing a network attacker with a CA-trusted certificate containing any IP SubjectAltName to intercept libgit2 connections to IP-literal HTTPS URLs. DNS SubjectAltName validation and non-OpenSSL TLS backends are not affected. This issue is fixed in versions 1.8.6 and 1.9.5.",
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          "text": "https://www.suse.com/security/cve/CVE-2026-53587"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 performs a fixed-size strncmp in set_data in src/libgit2/transports/smart_pkt.c without first verifying that the smart-protocol pkt-line capability buffer contains 14 bytes. A malicious Git server can make bytes after the pkt-line complete object-format=, causing format_str to advance beyond the pkt-line and the following memchr length calculation to underflow. The resulting heap out-of-bounds walk can crash a client during the first refs-advertisement packet over HTTP, HTTPS, SSH, or the Git protocol. This issue is fixed in versions 1.8.6 and 1.9.5.",
          "title": "CVE description"
        }
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      "product_status": {
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-53587",
          "url": "https://www.suse.com/security/cve/CVE-2026-53587"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271695 for CVE-2026-53587",
          "url": "https://bugzilla.suse.com/1271695"
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      ],
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        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-20T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-53587"
    }
  ]
}

CVE-2026-53583 (GCVE-0-2026-53583)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:39 – Updated: 2026-08-20 19:04

Title

libgit2: Inverted IP SubjectAltName Comparison in OpenSSL Backend

Summary

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verify_server_cert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GEN_IPADD branch when comparing an IP-literal host with a certificate IP SubjectAltName. OpenSSL builds reject matching IP addresses and accept mismatched IP addresses, allowing a network attacker with a CA-trusted certificate containing any IP SubjectAltName to intercept libgit2 connections to IP-literal HTTPS URLs. DNS SubjectAltName validation and non-OpenSSL TLS backends are not affected. This issue is fixed in versions 1.8.6 and 1.9.5.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 19:03 UTC

CWE

CWE-295 - Improper Certificate Validation
CWE-297 - Improper Validation of Certificate with Host Mismatch

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/libgit2/libgit2/security/advis…	x_refsource_CONFIRM
https://github.com/libgit2/libgit2/commit/647dcb4…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/c2aa354…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/ef086bc…	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.8.6	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
libgit2	libgit2	Affected: < 1.8.6 Affected: >= 1.9.0, < 1.9.5

Show details on NVD website

JSON

To clipboard

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CVE-2026-53584 (GCVE-0-2026-53584)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:35 – Updated: 2026-08-20 19:48

Title

libgit2: Submodule path traversal

Summary

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 does not reject traversal components in a submodule path loaded from .gitmodules. The affected src/libgit2/submodule.c paths include git_submodule_lookup and git_submodule_add_setup. A crafted repository can specify a path such as ../escape-target, and applications that initialize the submodule can create directories outside the repository working tree. This issue is fixed in versions 1.8.6 and 1.9.5.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 19:48 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/libgit2/libgit2/security/advis…	x_refsource_CONFIRM
https://github.com/libgit2/libgit2/commit/419637d…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/467c2d9…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/ec7371d…	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.8.6	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
libgit2	libgit2	Affected: < 1.8.6 Affected: >= 1.9.0, < 1.9.5

Show details on NVD website

JSON

To clipboard

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CVE-2026-53585 (GCVE-0-2026-53585)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:37 – Updated: 2026-08-25 15:21

Title

libgit2: Unbounded Memory Allocation via Delta Object Result-Size Header

Summary

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, git_delta_apply in src/libgit2/delta.c trusts the attacker-controlled res_sz value parsed by hdr_sz from a delta object header and passes that amount to git__malloc before validating delta instructions. Malicious pack data supplied through git_clone, git_fetch, git_remote_fetch, git_indexer_append, or a local attacker-supplied repository can use a very small multi-level OFS_DELTA chain to retain extremely large allocations and exhaust memory. This issue is fixed in versions 1.8.6 and 1.9.5.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 15:21 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/libgit2/libgit2/security/advis…	x_refsource_CONFIRM
https://github.com/libgit2/libgit2/commit/0cdfdd5…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/c1896f0…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/dec22ac…	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.8.6	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
libgit2	libgit2	Affected: < 1.8.6 Affected: >= 1.9.0, < 1.9.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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CVE-2026-53586 (GCVE-0-2026-53586)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:40 – Updated: 2026-08-21 21:46

Title

libgit2: HTTP transport can leak credentials to an offsite redirect target

Summary

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, the built-in HTTP transport in src/libgit2/transports/http.c follows an offsite initial redirect, and handle_remote_auth and handle_auth pass transport->owner->url instead of transport->server.url to the credential callback when the redirected host returns 401 Unauthorized. A callback that scopes credentials to the original trusted URL can therefore return GIT_CREDENTIAL_USERPASS_PLAINTEXT credentials that libgit2 stores in transport->server.cred and sends as an Authorization header to the redirected host. An attacker who controls a trusted Git host or an open redirect on that host can disclose HTTP Basic credentials, personal access tokens, or equivalent credentials. This issue is fixed in versions 1.8.6 and 1.9.5.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:58 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-522 - Insufficiently Protected Credentials
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/libgit2/libgit2/security/advis…	x_refsource_CONFIRM
https://github.com/libgit2/libgit2/commit/07de6a7…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/af2b29a…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/c1507ab…	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.8.6	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
libgit2	libgit2	Affected: < 1.8.6 Affected: >= 1.9.0, < 1.9.5

Show details on NVD website

JSON

To clipboard

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CVE-2026-53587 (GCVE-0-2026-53587)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:36 – Updated: 2026-08-20 19:18

Title

libgit2 - Unauthenticated network-reachable heap out-of-bounds read in transports/smart_pkt.c:set_data

Summary

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 performs a fixed-size strncmp in set_data in src/libgit2/transports/smart_pkt.c without first verifying that the smart-protocol pkt-line capability buffer contains 14 bytes. A malicious Git server can make bytes after the pkt-line complete object-format=, causing format_str to advance beyond the pkt-line and the following memchr length calculation to underflow. The resulting heap out-of-bounds walk can crash a client during the first refs-advertisement packet over HTTP, HTTPS, SSH, or the Git protocol. This issue is fixed in versions 1.8.6 and 1.9.5.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 19:18 UTC

CWE

CWE-20 - Improper Input Validation
CWE-125 - Out-of-bounds Read
CWE-126 - Buffer Over-read
CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/libgit2/libgit2/security/advis…	x_refsource_CONFIRM
https://github.com/libgit2/libgit2/commit/2c0ce8c…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/affda60…	x_refsource_MISC
https://github.com/libgit2/libgit2/commit/d7a9fb8…	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.8.6	x_refsource_MISC
https://github.com/libgit2/libgit2/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
libgit2	libgit2	Affected: < 1.8.6 Affected: >= 1.9.0, < 1.9.5

Show details on NVD website

JSON

To clipboard

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  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2026:11315-1

CVE-2026-53583 (GCVE-0-2026-53583)

CVE-2026-53584 (GCVE-0-2026-53584)

CVE-2026-53585 (GCVE-0-2026-53585)

CVE-2026-53586 (GCVE-0-2026-53586)

CVE-2026-53587 (GCVE-0-2026-53587)

Tags

Sightings

Nomenclature

Related by attack behaviour