CVE-2026-116543: open5gs open5gs

Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser

CVSS 8.7 HighEPSS 0.0039 · 32nd percentile

Published by the CVE Program (CNA: VulnCheck) at 26 Oct 2026, 14:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
open5gs	open5gs	affected 1.3.0 to 2.8.0, inclusive semver Other versions: unaffected

Identifiers

CVE-2026-116543

CNA

VulnCheck

Weakness (CWE)

CWE-787

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	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)Used for this record
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0039, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

26 Oct 2026, 14:59 UTC Confirmed by the CVE List
26 Oct 2026, 16:17 UTC Confirmed by NVD

Sources

References from the CNA

github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g vendor-advisory
github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df patch
github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372 technical-description
github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260 technical-description
github.com/open5gs/open5gs product
www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.