Red Hat Security Advisory: nghttp2 security update
libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 (HTTP/2) protocol in C. Security Fix(es): * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The vulnerability CVE-2026-27135 affects libnghttp2, a C library implementing HTTP/2. It allows denial of service via malformed HTTP/2 frames sent after the session has terminated. This can cause the affected software to crash or become unresponsive. The issue is tracked under CWE-617 (Reachable Assertion). Red Hat has issued an update for Red Hat Enterprise Linux 10.0 Extended Update Support and related products to fix this vulnerability.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions in affected systems running vulnerable versions of libnghttp2. This may lead to service interruptions or crashes in applications relying on this library for HTTP/2 communications. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated packages for libnghttp2 that address this vulnerability. Users of Red Hat Enterprise Linux 10.0 Extended Update Support and related products should apply the security update as described in Red Hat advisory RHSA-2026:8868 and the referenced article https://access.redhat.com/articles/11258. Applying this update remediates the issue. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: nghttp2 security update
Description
libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 (HTTP/2) protocol in C. Security Fix(es): * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-27135 affects libnghttp2, a C library implementing HTTP/2. It allows denial of service via malformed HTTP/2 frames sent after the session has terminated. This can cause the affected software to crash or become unresponsive. The issue is tracked under CWE-617 (Reachable Assertion). Red Hat has issued an update for Red Hat Enterprise Linux 10.0 Extended Update Support and related products to fix this vulnerability.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions in affected systems running vulnerable versions of libnghttp2. This may lead to service interruptions or crashes in applications relying on this library for HTTP/2 communications. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated packages for libnghttp2 that address this vulnerability. Users of Red Hat Enterprise Linux 10.0 Extended Update Support and related products should apply the security update as described in Red Hat advisory RHSA-2026:8868 and the referenced article https://access.redhat.com/articles/11258. Applying this update remediates the issue. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:8868
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a18ab6de29bf47b50287c21
Added to database: 5/28/2026, 8:54:05 PM
Last enriched: 5/28/2026, 8:57:10 PM
Last updated: 5/29/2026, 1:15:14 PM
Views: 9
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