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CVE-2026-27135 nghttp2 Denial of service: Assertion failure due to the missing state validation

🗓️ 18 Mar 2026 17:59:02Reported by GoogleType 
osv
 osv🔗 osv.dev

CVE-2026-27135: nghttp2 DoS from missing state validation; assertion after terminate_session and malformed frames.

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ATTACKERKB		CVE-2026-27135
18 Mar 202617:59
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Tenable Nessus		Amazon Linux 2023 : libnghttp2, libnghttp2-devel, nghttp2 (ALAS2023-2026-1542)
13 Apr 202600:00
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Tenable Nessus		Amazon Linux 2023 : nodejs24, nodejs24-devel, nodejs24-full-i18n (ALAS2023-2026-1647)
20 May 202600:00
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Tenable Nessus		Amazon Linux 2023 : nodejs22, nodejs22-devel, nodejs22-full-i18n (ALAS2023-2026-1648)
20 May 202600:00
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Tenable Nessus		Amazon Linux 2 : nghttp2, --advisory ALAS2-2026-3232 (ALAS-2026-3232)
14 Apr 202600:00
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Tenable Nessus		AlmaLinux 10 : nodejs22 (ALSA-2026:7080)
10 Apr 202600:00
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Tenable Nessus		AlmaLinux 8 : nodejs:22 (ALSA-2026:7123)
16 Apr 202600:00
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17 Apr 2026 13:29Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.5
EPSS0.0003
nghttp2state validationterminate sessionframe size errorassertion failureversion 1.68.1
0