10

CVE-2026-111815: apache software foundation apache traffic server Improper Certificate Validation

CVSS: 10.0v3.1CriticalReceived
AliasesDEBIAN-CVE-2026-111815
Published 21-10-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-111815 is a critical (CVSS 10.0) Improper Certificate Validation vulnerability in apache software foundation apache traffic server.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v3.1 (CVE.org)
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-10-2026
    PublishedVulnerability first disclosed.

Description

Apache Traffic Server can resume a TLS session across SNI virtual hosts without re-verifying a client certificate required by the resumed host's verify_client STRICT policy. 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.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache software foundation1 product
Debian1 product
  • trafficserverAll versions (No fix recorded)

2 vendors · 2 products

References

2 links