Medium 5.3Published Sep 15, 2026

CVE-2026-91855Open5GS PFCP Message handler.c denial of service

Updated under an hour ago (2026-10-19 06:25 UTC)

Does this affect you?

It affects n/a Open5GS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for n/a Open5GS

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a Open5GS open5gs:open5gs	2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; 2.7.6; 2.7.7	CNA record

References

https://vuldb.com/vuln/404086vdb-entry
https://vuldb.com/vuln/404086/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-91855third-party-advisory
https://vuldb.com/submit/933834third-party-advisory
https://github.com/open5gs/open5gs/issues/4699exploit, issue-tracking
https://github.com/open5gs/open5gs/commit/028e1dbb5e3271035ccee906ef417a97fc523f71patch
https://github.com/open5gs/open5gs/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.