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CVE-2026-116543

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

HIGH
7.5
CVSS Score
Published: October 26, 2026 at 02:59 PM UTC
Updated: October 26, 2026 at 04:17 PM UTC
1 product affected across 1 vendorOpen5GS

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Vendor Advisory
Source: cverecord
https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g
Patch
Source: cverecord
https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df
Technical Description
Source: cverecord
https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372
Technical Description
Source: cverecord
https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260
Product
Source: cverecord
https://github.com/open5gs/open5gs
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-787

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