CVE-2026-116543

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 32.5% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-26 14:59Z3 DAYS AGO

Last updated

2026-10-26 14:59Z3 DAYS AGO

Reserved

2026-10-26

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

3fddbcf6455bf760d5f03da60bb4bf2b9c340b59db493dba154643b611d155bc

• github.comGitHub Security Advisory (GHSA-25v2-v588-jq8g)https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8gvendor-advisory
• github.comPatch Commithttps://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732dfpatch
• github.comhttps://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372technical-description
• github.comhttps://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260technical-description
• github.comhttps://github.com/open5gs/open5gsproduct
• www.vulncheck.comVulnCheck Advisory: Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parserhttps://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parserthird-party-advisory