PT-2026-36930 · Open5Gs · Open5Gs

Frankylin · Published 2026-05-04 · Updated 2026-05-04 · CVE-2026-7781

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions Open5GS versions prior to 2.7.8

Description A remote denial of service can be triggered via the udm nudm uecm handle amf registration update() function within the /src/udm/nudm-handler.c file of the amf-3gpp-access endpoint.

Recommendations As a temporary workaround, restrict access to the udm nudm uecm handle amf registration update() function to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

CVE-2026-7781

Affected Products

Open5Gs

References · 8

• 🔥 https://github.com/open5gs/open5gs/issues/4420 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7781 · Security Note
• https://twitter.com/infoflowcloud/status/2051436980400013354 · Twitter Post
• https://github.com/open5gs/open5gs · Note
• https://vuldb.com/vuln/360978 · Note
• https://twitter.com/CVEnew/status/2051435660813516835 · Twitter Post
• https://vuldb.com/vuln/360978/cti · Note
• https://vuldb.com/submit/806251 · Note