CVE-2026-73055 Shescape before 2.1.15 and 3.0.2 Home Directory Disclosure via BusyBox
Attackers can disclose home directory paths and potentially alter command targets by injecting tilde characters in specific BusyBox shell environments.
- 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-2026-73055?
CVE-2026-73055 is a medium-severity vulnerability in ericcornelissen shescape, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to properly escape tilde (~) characters in assignment contexts on Unix systems where the shell is explicitly configured to "sh" or true and /bin/sh points to BusyBox. Using the escape and escapeAll APIs with untrusted input in an assignment prefixed to a command, an attacker can inject a tilde payload to disclose the user's home directory location and, depending on usage, alter the location on which a command operates.
Which versions are affected by CVE-2026-73055?
How do I fix CVE-2026-73055?
No fix has been published for CVE-2026-73055 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-73055 being exploited?
There is no known exploitation of CVE-2026-73055 in the wild and no public exploit code.
Sources
Also known as GHSA-j44h-fqhh-fh28, GHSA-jfpg-hfv5-2rf7.