Advisory severityCritical9.1Apache Software Foundation Updated

Critical [CVE-2026-101356] Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users

This critical-severity Apache Software Foundation advisory covers CVE-2026-101356 affecting Apache Tomcat.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-101356 Source published Oct 21, 2026Source updated Oct 20, 2026

VulniPulse record published Oct 21, 2026Record updated Oct 21, 2026

CVE-2026-101356

Affected products & platforms

Apache Software FoundationTomcat

Open source advisory

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Summary

Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users.

This issue affects Apache Tomcat: from 11.0.22 through 11.0.26, from 10.1.55 through 10.1.60, from 9.0.118 through 9.0.122.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue.

Affected versions

11.0.22 through 11.0.26
10.1.55 through 10.1.60
9.0.118 through 9.0.122.
through 9.0.122

Official advisory · high-confidence parse· fetched 24 hours ago·verify at source

Fixed versions

11.0.27
10.1.61
9.0.123

Official advisory · high-confidence parse· fetched 24 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue.

Official advisory · high-confidence parse· fetched 24 hours ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-101356 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-101356NVD CVE.org MITRE

Official resources

Apache Tomcat security bulletins (per major version) (target: 11.0.27 / 10.1.61 / 9.0.123)
Official documentation
This advisory names 11.0.27 / 10.1.61 / 9.0.123 as the first fixed releases — official upgrade documentation for Apache Tomcat security bulletins (per major version).
ASF Security — reporting & CVE process
Official documentation
The Apache Software Foundation's official security page: how ASF CVEs are published and where each project's advisories live.
Apache project downloads (fixed releases)
Official documentation
Official ASF download tree — fetch the fixed release named in this advisory from the project's directory.

Discussion(0)

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