VULNERABILITY INTELLIGENCE
CVE-2026-73055
CVSS score9.3 CRITICAL
EPSS probability0.36%
CISA KEVNot currently listed
Published2026-08-15
Last modified2026-08-31
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
Weakness classification
- CWE-116: Improper Encoding or Escaping of Output
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor