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CVE-2026-80353

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

CVSS score

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EPSS probability

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Risk score

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Published

4 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Apache Tomcat TOCTOU Vulnerability in APR/Native Connector

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A time-of-check time-of-use (TOCTOU) race condition vulnerability exists in Apache Tomcat when creating unix domain sockets for the APR/Native connector. An unauthorised local user can access the unix domain socket. The issue affects versions from 9.0.47 through 9.0.122.

Why does it matter?

It compromises local security boundaries by allowing unauthorised local users to access unix domain sockets. The previous fix for CVE-2026-65183 only addressed the NIO connector and did not resolve the same issue in the APR/Native connector.

What should be done?

  • Upgrade to version 9.0.123 which fixes the issue
  • Follow vendor advisories
Chain of evidence and sources2 verified claims

Apache Tomcat 9.0.47 ile 9.0.122 sürümleri arasındaki APR/Native bağlayıcısı TOCTOU yarış durumu zafiyetinden etkilenmektedir.

S0 · daybreach-canonicalS1 · cvelist

CVE-2026-65183 için sunulan düzeltme NIO bağlayıcısını ele almış ancak APR/Native bağlayıcısını kapsamamıştır.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

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.

CWE: CWE-367

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-80353 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Apache Software FoundationApache Tomcat View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
The sources have not yet published a verified CVSS metric.

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-80353 is associated with the following CWEs:

CWE-367: Common Weakness Enumeration Entry CWE-367

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-80353 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Official Sources and Advisories

https://lists.apache.org/thread.html/tr0q87qwvs80p9hc53tkwpzvnx0ywftrvendor-advisory

Yama durumu bilinmiyor

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AS
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Apache Software Foundation

Weakness Type (CWE & CAPEC)

CWE-367

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CVE-2026-80353 · Apache Tomcat: TOCTOU when setting specific…