Debian dla-4581 : libnghttp2-14 - security update

high Nessus Plugin ID 314499

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4581 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4581-1 [email protected] https://www.debian.org/lts/security/ Lukas Mrdian May 13, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : nghttp2 Version : 1.43.0-1+deb11u3 CVE ID : CVE-2026-27135 Debian Bug : 1131369

A vulnerabilitie was discovered in nghttp2, a server, proxy and client implementing HTTP/2.

CVE-2026-27135

Fix missing iframe->state validations to avoid assertion failure. As backported from upstream v1.68.1 (commit 5c7df8f), incl. upstream test case from commit c619c7be0737ac78051b1cacf4b1ce5467eb838d.

For Debian 11 bullseye, this problem has been fixed in version 1.43.0-1+deb11u3.

We recommend that you upgrade your nghttp2 packages.

For the detailed security status of nghttp2 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/nghttp2

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libnghttp2-14 packages.

Plugin Details

Severity: High

ID: 314499

File Name: debian_DLA-4581.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/13/2026

Updated: 5/13/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-27135

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:nghttp2-server, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:nghttp2-proxy, p-cpe:/a:debian:debian_linux:libnghttp2-doc, p-cpe:/a:debian:debian_linux:libnghttp2-dev, p-cpe:/a:debian:debian_linux:nghttp2-client, p-cpe:/a:debian:debian_linux:nghttp2, p-cpe:/a:debian:debian_linux:libnghttp2-14

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/13/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-27135

Detections

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