CVE-2026-79900 Heap overflow in KSL checksum initialization
An authenticated attacker can trigger a heap overflow in BoKS Manager by supplying an oversized checksum algorithm name, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79900?
CVE-2026-79900 is a medium-severity memory corruption vulnerability in Fortra BoKS Manager boks-server, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
boks_ksllogsd accepts a checksum algorithm name in the MD field of an authenticated KSL start message. Affected releases verify that OpenSSL recognizes the digest name but do not verify that the value fits in a fixed 16-byte checksum context field before copying it. An authenticated KSL client can supply an oversized, OpenSSL-recognized digest name and write beyond the end of the heap allocation.
Weakness: CWE-787
Which versions are affected by CVE-2026-79900?
How do I fix CVE-2026-79900?
No fix has been published for CVE-2026-79900 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-79900 being exploited?
There is no known exploitation of CVE-2026-79900 in the wild and no public exploit code.
Sources
Also known as GHSA-58w4-cf2c-hf22.