Paper/Archive/CVE-2026-111812

CVE-2026-111812

Apache Software Foundation Apache Traffic Server — Apache Traffic Server: origin_server_auth signs client-controlled AWS headers under the proxy's IAM credentials

EPSS 0.4%CVSS 10.0

critical.is priorityof 100

CVSS 10.0 (CNA)10.0 / 10 × 3030.0 Not in CISA KEV+300.0 EPSS percentile 29.8.298 × 206.0 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Apache Traffic Server8.0.0 – 8.1.11–CNA

Apache Traffic Server9.0.0 – 9.2.15–CNA

Apache Traffic Server10.0.0 – 10.1.4–CNA

Apache Traffic Server10.2.0–CNA

Scores by source

apache (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

apache (CNA)7.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc