OPENSUSE-SU-2026:12076-1
Vulnerability from csaf_opensuse - Published: 2026-10-07 00:00 - Updated: 2026-10-08 18:02Summary
traefik-3.7.13-1.1 on GA media
Severity
Moderate
Notes
Title of the patch: traefik-3.7.13-1.1 on GA media
Description of the patch: These are all security issues fixed in the traefik-3.7.13-1.1 package on the GA media of openSUSE Tumbleweed.
Patchnames: openSUSE-Tumbleweed-2026-12076
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.4 (High)
Affected products
Recommended
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:traefik-0:3.7.13-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:traefik-0:3.7.13-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:traefik-0:3.7.13-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
9.1 (Critical)
Affected products
Recommended
4 products, the same list as for
CVE-2026-88004
Threats
Impact
critical
9.1 (Critical)
Affected products
Recommended
4 products, the same list as for
CVE-2026-88004
Threats
Impact
critical
8.2 (High)
Affected products
Recommended
4 products, the same list as for
CVE-2026-88004
Threats
Impact
important
Affected products
Recommended
4 products, the same list as for
CVE-2026-88004
Threats
Impact
moderate
References
12 references
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{
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"text": "Traefik is an open source HTTP reverse proxy and load balancer. From 3.2.0 until 3.7.13, Traefik entrypoint defenses aliasHeadersStrategy, underscoreHeadersStrategy, and forwardedHeaders inspect req.Header but not req.Trailer, allowing an unauthenticated client to submit an aliasing or trusted header name in an HTTP/1.1 chunked trailer or an HTTP/2 trailer. When the retry or buffering middleware reads the body before the reverse proxy clones the request, the attacker-controlled trailer value reaches a backend that merges trailers into the header namespace, bypassing the documented delete or reject behavior and potentially spoofing identity or forwarded routing data. This issue is fixed in 3.7.13.",
"title": "CVE description"
}
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"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x",
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{
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"text": "Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection. With HTTP/3 enabled, a backend using connection-bound NTLM or Negotiate authentication, and backend keep-alive, an unrelated client can reuse a backend connection authenticated for a victim, read victim-only data, and act as that victim without the victim credentials. This issue is fixed in 2.11.57 and 3.7.13.",
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"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x",
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"text": "https://www.suse.com/security/cve/CVE-2026-88008"
}
],
"notes": [
{
"category": "general",
"text": "Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.",
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{
"category": "general",
"text": "Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth, encodedCharacters, and access logging against a path normalized to / but forwards URL.Opaque verbatim to the backend, allowing cross-vhost routing bypass, path-scoped authorization bypass, and access-log evasion when the backend interprets the opaque target as a path. This issue is fixed in 2.11.57 and 3.7.13.",
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"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x",
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{
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"date": "2026-10-07T00:00:00Z",
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"title": "CVE-2026-88009"
},
{
"cve": "CVE-2026-88010",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-88010"
}
],
"notes": [
{
"category": "general",
"text": "Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurrent requests for absent usernames therefore coalesce on one key while configured usernames perform separate password hashes, creating an unauthenticated timing discrepancy that reveals whether a username exists. Sequential checks remain cost-equalized, Traefik v2 and Digest authentication are not affected, and the issue does not disclose credentials or bypass authentication. This issue is fixed in version 3.7.13.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.aarch64",
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.ppc64le",
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x",
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-88010",
"url": "https://www.suse.com/security/cve/CVE-2026-88010"
}
],
"remediations": [
{
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"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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"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.aarch64",
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.ppc64le",
"openSUSE Tumbleweed:traefik-0:3.7.13-1.1.s390x",
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"category": "impact",
"date": "2026-10-07T00:00:00Z",
"details": "moderate"
}
],
"title": "CVE-2026-88010"
}
]
}
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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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