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VulnerabilityPublished

CVE-2026-114641: traefik · Race Condition

Affects traefikSource CVE Database V5

0

Not known to be exploited · CVSS 6.3 Medium : upgrade to 2.11.58 when convenient.

Data as of 26 Oct 2026, 13:07 UTC

CVSS 4.0 base score
6.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.11.58, 3.7.14
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade traefik to 2.11.58; traefik to 3.7.14; traefik to 3.7.14 or 2.11.58.

Affected software

ProductAffectedFixed in
traefiktraefikAffected
  • >=2.11.0 <2.11.58
Fixed in
  • 2.11.58
traefiktraefikAffected
  • >=3.0.0 <3.7.14
Fixed in
  • 3.7.14
Gotraefikpkg:golang/traefikOther threatsAffected
  • >=2.11.0 <2.11.58
  • >=3.0.0 <3.7.14
Fixed in
  • 2.11.58
  • 3.7.14

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.

References

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