Vulnerability · Published Aug 22, 2026 · Assigned by VulnCheck
CVE-2026-68767hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl()
Medium 6.1
In plain English
A medium-severity security flaw in hashcat from hashcat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 93.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | hashcat | no fix listed | DEBIAN-CVE-2026-68767 |
| Debian:13 | hashcat | no fix listed | DEBIAN-CVE-2026-68767 |
| Debian:14 | hashcat | no fix listed | DEBIAN-CVE-2026-68767 |
| Ubuntu:22.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-68767 |
| Ubuntu:24.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-68767 |
| Ubuntu:26.04:LTS | hashcat | no fix listed | UBUNTU-CVE-2026-68767 |
| Ubuntu:26.10 | hashcat | no fix listed | UBUNTU-CVE-2026-68767 |
Affected products (as reported)
Weakness: CWE-193 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- GitHub Issue #4739 issue-tracking
- https://github.com/hashcat/hashcat product
- https://github.com/hashcat/hashcat/commit/93b55d37d3b2340013d4036f10181ddc67d44249 patch
- https://github.com/hashcat/hashcat/blob/v7.1.2/src/filehandling.c#L1032-L1060 technical-description
- VulnCheck Advisory: hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl() third-party-advisory