CVE-2026-91855CWE-404

CVE-2026-91855

Medium · published September 15, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
53.5
In the wild
Unconfirmed
What it is

A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this vulnerability is an unknown functionality of the file lib/pfcp/handler.c of the component PFCP Message Handler. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The patch is named 028e1dbb5e3271035ccee906ef417a97fc523f71. Applying a patch is the recommended action to fix this issue. CVE-2025-29339 describes a different assertion failure vulnerability in Open5GS UPF.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00724 · 53.5th percentile
Weakness
CWE-404 · Improper Resource Shutdown or Release
Published
2026-09-15T21:17Z
References (7)
https://github.com/open5gs/open5gs/ · [email protected]https://github.com/open5gs/open5gs/commit/028e1dbb5e3271035ccee906ef417a97fc523f71 · [email protected]https://github.com/open5gs/open5gs/issues/4699 · [email protected]https://vuldb.com/cve/CVE-2026-91855 · [email protected]https://vuldb.com/submit/933834 · [email protected]https://vuldb.com/vuln/404086 · [email protected]https://vuldb.com/vuln/404086/cti · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 16:45Z
    Open5GS PFCP Message handler.c denial of service
    cvelistv5