Paper/Archive/CVE-2026-111811

CVE-2026-111811

Apache Software Foundation Apache Traffic Server — Apache Traffic Server: tsmemcache plugin exposes the shared proxy cache over the network with no authentication

EPSS 0.4%CVSS 9.4

critical.is priorityof 100

CVSS 9.4 (CNA)9.4 / 10 × 3028.2 Not in CISA KEV+300.0 EPSS percentile 29.3.293 × 205.9 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Apache Traffic Server's experimental tsmemcache plugin allows unauthenticated network read, write, and deletion of the shared proxy cache. 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)9.4CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H

apache (CNA)9.0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorylists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc