CVE-2026-73055: Ericcornelissen Shescape

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Ericcornelissen Shescape: before 2.1.15 (fixed in 2.1.15); from 3.0.0, before 3.0.2 (fixed in 3.0.2)

Published 2026-08-15. Last modified 2026-08-31.