Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/ericcornelissen/shescape/commit/7cba30594c16a21524706efe2f6c6
- https://github.com/ericcornelissen/shescape/commit/d86bf2ae22961c73458bddf70dd06
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j44h-fqhh-f
- https://www.vulncheck.com/advisories/shescape-before-home-directory-disclosure-v
FAQ
What is CVE-2026-73055?
CVE-2026-73055 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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/s...
How severe is CVE-2026-73055?
CVE-2026-73055 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73055?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.