Description
Open5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability in parse_multipart() that allows unauthenticated attackers to corrupt memory by supplying an empty multipart boundary. Attackers can send a single crafted multipart/related request to the SBI interface of any network function, overflowing the lookbehind buffer and crashing it.
References7
- github.com/open5gs/open5gs
- github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipar…
- github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372
- github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92da…
- github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-j…
- www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-o…
- github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-j…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 33 · as of 8 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.