CVE-2026-77762
Last modified
CVE-2026-77762 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue..
Description
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Tomcat | >= 11.0.0-M1, <= 11.0.25; >= 10.1.0-M1, <= 10.1.59; >= 9.0.39, <= 9.0.121; >= 8.56.59, <= 8.5.100 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-77762?
How severe is CVE-2026-77762?
How do I fix CVE-2026-77762?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-77756Inconsistent Interpretation of HTTP Requests ('HTTP Request/…3.7
- CVE-2026-77757The Directorist: AI-Powered Business Directory, Listings & C…5.4
- CVE-2026-77758The Stripe Payment Forms by WP Full Pay WordPress plugin be…5.3
- CVE-2026-77759Authorization Bypass Through User-Controlled Key in the tran…8.7
- CVE-2026-7776Boundary Community Edition and Boundary Enterprise (“Boundar…7.5
- CVE-2026-77761A parser state isolation vulnerability in misp-stix could ca…6.3
- CVE-2026-77763The filestore backend in pkg/object/file.go, used for file:/…6.5
- CVE-2026-77764The GamiPress WordPress plugin before 7.9.9.6 does not prop…4.3
- CVE-2026-77765The Better Payment WordPress plugin before 2.3.4 does not v…5.3
- CVE-2026-77766The Directorist: AI-Powered Business Directory, Listings & C…4.3
- CVE-2026-77767Reconmap's API applies a fallback authorization policy in ap…7.5
- CVE-2026-77768The report.get procedure in packages/trpc/src/routers/report…6.5
Are you affected by CVE-2026-77762?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST