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
CVE-2026-101356: Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request…
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-101356 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Critical
- CVSS base score
- 9.1 (Apache), 5.3 (Red Hat)
- Weakness
- CWE-488
- Fixed releases
- Apache: 11.0.27, 10.1.61, 9.0.123
- Red Hat: tomcat10-main-10.1.61-0.1.hum1, tomcat11-main-11.0.27-0.1.hum1, RHSA-2026:85926
- VulniPulse record
- Published · Updated
Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-101356; bulletin-wide values are not repeated here.
Is CVE-2026-101356 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-101356 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-101356?
Upgrade to a fixed release named by the vendor:
- Apache: 11.0.27, 10.1.61, 9.0.123
- Red Hat: tomcat10-main-10.1.61-0.1.hum1, tomcat11-main-11.0.27-0.1.hum1, RHSA-2026:85926
- Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue. (Apache)
Vendor advisory comparison
Apache
1 advisory- Advisory severityCritical9.1
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
CVE-2026-101356Source published Source updated
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 products in this advisory
- Apache Tomcat
- Source-reported 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
- Source-reported fixed versions
- 11.0.27
- 10.1.61
- 9.0.123
- Mitigation guidance
- Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue.
Red Hat
1 advisory- Advisory severityMedium5.3
Medium [CVE-2026-101356] Information disclosure via incorrect object recycling in HTTP/2 processing
CVE-2026-101356Source published Source updated
Information disclosure via incorrect object recycling in HTTP/2 processing. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-488. Red Hat lists fixing advisory RHSA-2026:85926 with package tomcat10-main-10.1.61-0.1.hum1, tomcat11-main-11.0.27-0.1.hum1. Affected product named by the advisory: Red Hat Hardened Images.
- Related products — impact not confirmed
- Red Hat Hardened Images
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- tomcat10-main-10.1.61-0.1.hum1
- tomcat11-main-11.0.27-0.1.hum1
- RHSA-2026:85926
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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