CVE-2026-54340

תיאור (מקור, אנגלית)

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.

מדדים

CVSS 3.1

7.5 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-5/8/2026

CWE

CWE-400, CWE-770

מוצרים מושפעים

h2o: h2o

קישורים

• https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063 Patch
• https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9 Third Party Advisory