CVE-2026-88008
- Source
- https://cve.org/CVERecord?id=CVE-2026-88008
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-88008.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-88008
- Aliases
- Downstream
CGA (6)
openSUSE (1)
- Related
- Published
- 2026-09-10T14:57:06Z
- Modified
- 2026-09-27T18:26:40Z
- Severity
-
- 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
- Summary
- Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-444", "CWE-863" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88008.json" }- References
-
- https://github.com/traefik/traefik/releases/tag/v2.11.57
- https://github.com/traefik/traefik/releases/tag/v3.7.13
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88008.json
- https://github.com/traefik/traefik/security/advisories/GHSA-w4v4-9rw7-5326
- https://nvd.nist.gov/vuln/detail/CVE-2026-88008
- https://github.com/traefik/traefik/commit/a277e94664ffc1ce9543df552d3bbf48d4d3b8b3
- https://github.com/traefik/traefik/pull/13797
Affected packages
Git / github.com/traefik/traefik
Affected ranges
- Type
- GIT
- Repo
- https://github.com/traefik/traefik
- Events
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "2.11.26" }, { "fixed": "2.11.57" }, { "introduced": "3.4.2" }, { "fixed": "3.7.13" } ], "source": [ "CPE_RANGE", "REFERENCES" ] }
Affected versions
v2.*
v2.11.26
v2.11.27
v2.11.28
v2.11.29
v2.11.30
v2.11.31
v2.11.32
v2.11.33
v2.11.34
v2.11.35
v2.11.36
v2.11.37
v2.11.38
v2.11.39
v2.11.40
v2.11.41
v2.11.42
v2.11.43
v2.11.44
v2.11.45
v2.11.46
v2.11.47
v2.11.48
v2.11.49
v2.11.50
v2.11.51
v2.11.52
v2.11.53
v2.11.54
v2.11.55
v2.11.56