CVE-2026-91855

Open5GS PFCP Message handler.c denial of service

MEDIUM
5.3
CVSS Score
Published: September 15, 2026 at 04:45 PM UTC
Updated: September 16, 2026 at 01:57 PM UTC
1 product affected across 1 vendorOpen5GS

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/404086
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/404086/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-91855
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/933834
ExploitIssue Tracking
Source: cverecord
https://github.com/open5gs/open5gs/issues/4699
Product
Source: cverecord
https://github.com/open5gs/open5gs/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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