RHSA-2026:63151
Vulnerability from csaf_redhat - Published: 2026-09-03 11:17 - Updated: 2026-09-21 11:31Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
composer:
* composer-2.10.3-1.hum1 (noarch)
* composer-2.10.3-1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Composer, a dependency manager for PHP. A malicious or compromised dependency can bypass existing security measures designed to prevent unauthorized binary path execution. This can occur when Composer processes untrusted cached data or older build artifacts, allowing it to follow symlinked paths outside of its intended installation directory. As a result, Composer may change the permissions of external files to make them executable and create proxy entries, potentially leading to the execution of unauthorized binaries.
5.0 (Medium)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:composer-0:2.10.3-1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:composer-0:2.10.3-1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:composer-0:2.10.3-1.hum1@src | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in Composer. A malicious dependency package from a custom Composer repository or an untrusted `composer.lock` file could exploit a vulnerability in how Composer handles Perforce source URLs. By setting `source.type` to `perforce` and `source.url` to an `rsh:` or `jsh:` P4PORT value, an attacker could cause the Perforce `p4` client to execute arbitrary local commands. This could lead to arbitrary code execution with the privileges of the user or continuous integration (CI) account running Composer.
7.3 (High)
Affected products
Fixed
3 products, the same list as for
CVE-2026-59944
Threats
Impact
Important
References
22 references
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"name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
},
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"title": "composer: Composer: Security bypass allows execution of unauthorized binaries via symlinked paths"
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"text": "A flaw was found in Composer. A malicious dependency package from a custom Composer repository or an untrusted `composer.lock` file could exploit a vulnerability in how Composer handles Perforce source URLs. By setting `source.type` to `perforce` and `source.url` to an `rsh:` or `jsh:` P4PORT value, an attacker could cause the Perforce `p4` client to execute arbitrary local commands. This could lead to arbitrary code execution with the privileges of the user or continuous integration (CI) account running Composer.",
"title": "Vulnerability description"
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},
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"product_ids": [
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
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},
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"Red Hat Hardened Images:composer-0:2.10.3-1.hum1@src"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "composer: Composer: Arbitrary code execution via malicious Perforce source URL"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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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.
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