8.1

CVE-2026-80353: Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets - Fix for CVE-2026-65183 did not address APR connector

Awaiting analysis
AliasesDEBIAN-CVE-2026-80353UBUNTU-CVE-2026-80353
Published 20-10-2026Last modified 29-10-2026

Vulnerability summary

CVE-2026-80353 is a high (CVSS 8.1) vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 2
MGASA-2026-0568OPENSUSE-SU-2026:12254-1SUSE-SU-2026:4927-1

Timeline

  1. 20-10-2026
    PublishedVulnerability first disclosed.
  2. 29-10-2026
    Last modifiedVulnerability information updated.

Description

Time-of-check time-of-use (TOCTOU) race condition vulnerability in Apache Tomcat when creating unix domain sockets for the APR/Native connector allows an unauthorised local user to access the unix domain socket. The fix for CVE-2026-65183 only addressed the NIO connector. It did not address the same issue in the APR/Native connector. This issue affects Apache Tomcat: from 9.0.47 through 9.0.122. Users are recommended to upgrade to version 9.0.123, which fixes the issue.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

21-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu6 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat6All versions (No fix recorded)
  • tomcat7All versions (No fix recorded)
  • tomcat8All versions (No fix recorded)
Apache software foundation1 product
Debian1 product
  • tomcat9< 9.0.70-2

3 vendors · 8 products

References

5 links