CVE-2026-8704 Crypt::DSA versions through 1.19 for Perl use 2-args open, allowing existing files to be modified
An attacker can modify existing files by exploiting unsafe file opening practices in the Crypt::DSA Perl library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8704?
CVE-2026-8704 is a medium-severity path traversal vulnerability in TIMLEGGE Crypt::DSA, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Crypt::DSA versions through 1.19 for Perl use 2-args open, allowing existing files to be modified.
Weakness: CWE-552
Which versions are affected by CVE-2026-8704?
How do I fix CVE-2026-8704?
No fix has been published for CVE-2026-8704 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-8704 being exploited?
There is no known exploitation of CVE-2026-8704 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-8704, GHSA-5cq6-9f97-wjwx, UBUNTU-CVE-2026-8704.