๐Ÿ›ก๏ธ CVE-2026-27135
๐ŸŸ  CVSS 7.5 โ€” High โœ… No Known Exploit CWE-617 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-617
Public Exploit โœ… No
Source NVD
Published 2026-03-18
Updated 2026-06-02
Modified 2026-05-13

Affected Packages

Software From version Fixed in
nghttp2 โ€” 1.68.1

Similar Threats

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