High severity · published Oct 26, 2026
CVE-2026-116543
Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser
New
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open5gs · open5gs
1.3.0 through 2.8.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116543
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116543
github.com
https://github.com/open5gs/open5gs
github.com
https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260
github.com
https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372
github.com
https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df
github.com
https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g
www.vulncheck.com
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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