Vulnerability in Hashcat
CVE-2026-68767
hashcat's fgetl() function in src/filehandling.c writes a null terminator one byte past the caller's buffer when an input line is exactly the buffer length. Attackers can trigger this out-of-bounds heap write by providing a hash file, potfile, or wordlist containing a line of exactly HCBUFSIZ_LARGE bytes.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/hashcat/hashcat/issues/4739 (issue-tracking)
- github.com/hashcat/hashcat (product)
- github.com/hashcat/hashcat/commit/93b55d37d3b2340013d4036f10181ddc67d44249 (patch)
- github.com/hashcat/hashcat/blob/v7.1.2/src/filehandling.c (technical-description)
- www.vulncheck.com/advisories/hashcat-through-off-by-one-out-of-bounds-heap-writ… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-68767?
- CVE-2026-68767 is a medium-severity vulnerability in Hashcat, classified under Off-by-one Error. CVSS score: 6.1/10. Published 2026-08-22.
- How severe is CVE-2026-68767?
- Medium severity. CVSS v3 base score is 6.1 out of 10.