🛡️ CVE-2026-41682 on Ubuntu — libupnp

Distribution advisory

This page covers CVE-2026-41682 as tracked by Ubuntu, for the package libupnp. No fixed version has been recorded for this distribution yet.

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. No user interaction is required. Rated impact: confidentiality low, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Attack requirements: None — no deployment-specific condition has to hold.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: None.

Weakness class

UBUNTU-CVE-2026-41682 is classified as CWE-195: Signed to Unsigned Conversion Error. The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.

Affected software

UBUNTU-CVE-2026-41682 is recorded against 4 packages.

• libupnp
• mediatomb
• pupnp
• pupnp-1.8

Timeline and source

Published on 8 May 2026 and last revised on 20 May 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
github.com (Report)
github.com (Report)

Other advisories for this package

libupnp has other advisories on record. If you are patching this one, these are worth checking on the same host:

• MGASA-2026-0223 (published 18 Jun 2026)
• openSUSE-SU-2026:10641-1 (published 28 Apr 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-195: Signed to Unsigned Conversion Error) in other software:

• CVE-2026-55737 (7.5 High, published 27 Jul 2026)
• CVE-2026-55991 (5.9 Medium, published 22 Jul 2026)
• CVE-2026-26981 (6.5 Medium, published 13 Jul 2026)
• CVE-2026-41682 (published 8 May 2026)
• CVE-2025-67897 (5.3 Medium, published 14 Dec 2025)
• CVE-2025-65495 (7.5 High, published 24 Nov 2025)
• CVE-2025-30646 (6.5 Medium, published 9 Apr 2025)
• CVE-2025-24792 (4.4 Medium, published 29 Jan 2025)

CVE-2026-41682 on other distributions

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

Details

Affected Packages

References