What’s Vulnerable › Vulnerabilities

CVE-2026-116543: Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-26
• Weakness: CWE-787

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.

Affected products

• Open5GS: from 1.3.0 through 2.8.0

References

• https://github.com/open5gs/open5gs
• https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260
• https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372
• https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df
• https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g
• https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser

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