CVE-2026-111812CWE-863broken-access-control

CVE-2026-111812

Critical · published October 22, 2026

CVSS v3.1
10.0
EPSS
0%
Percentile
17.0
In the wild
Unconfirmed
What it is

Apache Traffic Server's origin_server_auth plugin lets a client force signing of attacker-chosen AWS request headers under the proxy's own credentials.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0.

Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
7.0 · 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
EPSS
0.00262 · 17.0th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-22T00:17Z
References (1)
https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 19:18Z
    Apache Traffic Server: origin_server_auth signs client-controlled AWS headers under the proxy's IAM credentials
    cvelistv5
  • 21 OCT 19:18Z
    Apache Traffic Server: origin_server_auth signs client-controlled AWS headers under the proxy's IAM credentials
    cvelistv5