CVE-2026-116543
Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| open5gs open5gs |
≥ 1.3.0; ≤ 2.8.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
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 | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g
exploit · ADP: CISA-ADP
References
- https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8gCNA: VulnCheck · vendor-advisory
- https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732dfCNA: VulnCheck · patch
- https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372CNA: VulnCheck · technical-description
- https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260CNA: VulnCheck · technical-description
- https://github.com/open5gs/open5gsCNA: VulnCheck · product
- https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parserCNA: VulnCheck · third-party-advisory
- https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8gADP: CISA-ADP · exploit
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