PT-2026-41538 · Open5Gs · Open5Gs

Ziyulin · Published 2026-05-17 · Updated 2026-05-18 · CVE-2026-8746

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

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

Description A use after free flaw exists in the NRF component within the discover handler() function located in the /lib/sbi/nghttp2-server.c library. This issue allows a remote attacker to manipulate the system, potentially leading to a crash or unauthorized code execution. Use after free occurs when an application continues to use a pointer after it has been freed, which can corrupt memory.

Recommendations Update to a version newer than 2.7.7. As a temporary workaround, restrict access to the NRF component to minimize the risk of exploitation.

Exploit

Fix

Use After Free

Buffer Overflow

Weakness Enumeration

CWE-416

CWE-119

Related Identifiers

CVE-2026-8746

Affected Products

Open5Gs

References · 10

• 🔥 https://github.com/open5gs/open5gs/issues/4476 · Exploit
• 🔥 https://vuldb.com/submit/817032 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-8746 · Security Note
• https://github.com/open5gs/open5gs · Note
• https://vuldb.com/vuln/364333/cti · Note
• https://vuldb.com/vuln/364333 · Note
• https://t.me/CVEtracker/54041 · Telegram Post
• https://t.me/cveNotify/163774 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2055979646961717699 · Twitter Post
• https://t.me/cveNotify/163923 · Telegram Post