PT-2026-28707 · Open5Gs · Open5Gs

Ziyulin · CVE-2026-4988 · Published 2026-03-27 · Updated 2026-03-28

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Open5GS version 2.7.6

Description A security flaw exists in Open5GS 2.7.6, specifically within the CCA Message Handler component and the smf gx cca cb/smf gy cca cb/smf s6b function. This manipulation can lead to a denial of service. The attack can be initiated remotely and is considered highly complex with difficult exploitability. The exploit has been publicly released.

Recommendations 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-2026-4988

Affected Products

Open5Gs

References · 10

• 🔥 https://github.com/open5gs/open5gs/issues/4342#issue-4021772232 · Exploit
• 🔥 https://github.com/open5gs/open5gs/issues/4342 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4988.json · Exploit
• 🔥 https://vuldb.com/?submit.771349 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4988 · Security Note
• https://osv.dev/vulnerability/CVE-2026-4988 · Vendor Advisory
• https://twitter.com/CVEnew/status/2037719357716144594 · Twitter Post
• https://github.com/open5gs/open5gs · Note
• https://vuldb.com/?id.353875 · Note
• https://vuldb.com/?ctiid.353875 · Note