CVE-2026-68765 hashcat KeePass KDBX v4 Module Heap Buffer Overflow via Token Field
Attackers can trigger heap corruption in hashcat's KeePass module via oversized input, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-68765?
CVE-2026-68765 is a medium-severity memory corruption vulnerability in hashcat, published on 17 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
Weakness: CWE-122
Which versions are affected by CVE-2026-68765?
How do I fix CVE-2026-68765?
No fix has been published for CVE-2026-68765 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-2026-68765 being exploited?
There is no known exploitation of CVE-2026-68765 in the wild and no public exploit code.
Sources
Also known as GHSA-jfqq-rfm8-8frm, UBUNTU-CVE-2026-68765.