CVE catalog
CVE-2026-26999
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.38 and 3.6.9, there is a potential vulnerability in Traefik managing TLS handshake on TCP routers. When Traefik processes a T
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.57% · Oct 25, 2026
A flaw was found in Traefik, an HTTP reverse proxy and load balancer. A remote unauthenticated client can exploit this vulnerability by sending an incomplete Transport Layer Security (TLS) record, which causes the TLS handshake to stall indefinitely. This can lead to resource exhaustion, such as file descriptors and goroutines, ultimately degrading the availability of all services on the affected entrypoint, resulting in a Denial of Service (DoS). github.com/traefik/traefik: Traefik: Denial of Service due to incomplete TLS handshake The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Go | github.com/traefik/traefik/v2 | Not reported | 2.11.38 | fixed |
| Go | github.com/traefik/traefik/v3 | Not reported | 3.6.9 | fixed |
| Go | github.com/traefik/traefik | Not reported | Not reported | unknown |
| Go | github.com/traefik/traefik/v2 | Not reported | 2.11.38 | fixed |
| Go | github.com/traefik/traefik/v3 | Not reported | 3.6.9 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Go | github.com/traefik/traefik/v2 | go | Not reported | 2.11.38 | Not reported | Not reported | Not reported |
| Go | github.com/traefik/traefik/v3 | go | Not reported | 3.6.9 | Not reported | Not reported | Not reported |
| Go | github.com/traefik/traefik/v2 | Go | Not reported | 2.11.38 | Not reported | Not reported | Not reported |
| Go | github.com/traefik/traefik/v3 | Go | Not reported | 3.6.9 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10314-1.json]
- [https://github.com/advisories/GHSA-xw98-5q62-jx94]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-26999]
- [https://pkg.go.dev/vuln/GO-2026-4594]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26999.json]
[FIRST EPSS] · [GitHub Advisory Database] · [Go Vulnerability Database] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]