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🛡️ CVE-2026-40930 on Debian 11 (Root.io) — libpng1.6

🟡 CVSS 5.0 — Medium ✅ No Known Exploit OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-40930 in libpng1.6 - Patched by Root

Root has patched CVE-2026-40930 in the libpng1.6 package for Root:Debian:11. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-40930 as tracked by Debian 11 (Root.io), for the package libpng1.6. The fix is available in version 1.6.37-3+deb11u4.root.io.6; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability low. (rating taken from the base CVE record.)

Weakness class

ROOT-OS-DEBIAN-11-CVE-2026-40930 is classified as CWE-436: Interpretation Conflict. Two components parse the same data differently, so a check in one is bypassed in the other.

Affected software

ROOT-OS-DEBIAN-11-CVE-2026-40930 is recorded against 2 packages.

  • libpng1.6 (fixed in 1.6.37-3+deb11u4.root.io.6)
  • rootio-libpng1.6 (fixed in 1.6.37-3+deb11u4.root.io.6)

Timeline and source

Published on 20 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2026-40930 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-20
Updated 2026-08-20
Modified 2026-08-20
Fix URL N/A

Affected Packages

Software From version Fixed in
libpng1.6 — 1.6.37-3+deb11u4.root.io.6
rootio-libpng1.6 — 1.6.37-3+deb11u4.root.io.6

References

N/A

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