CVE-2026-7836 hextoint macro uppercase bug
A remote authenticated attacker can cause limited data modification in Netatalk via crafted hexadecimal input due to a macro calculation error.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-7836?
CVE-2026-7836 is a low-severity vulnerability in Netatalk, published on 21 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.
Weakness: CWE-682
Which versions are affected by CVE-2026-7836?
How do I fix CVE-2026-7836?
Upgrade to a fixed version.
Is CVE-2026-7836 being exploited?
There is no known exploitation of CVE-2026-7836 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-7836, GHSA-766c-rr8x-xjvp, UBUNTU-CVE-2026-7836.