CVE-2026-73055

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 v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/ericcornelissen/shescape/commit/7cba30594c16a21524706efe2f6c6c9d8923f411
https://github.com/ericcornelissen/shescape/commit/d86bf2ae22961c73458bddf70dd06adf9dadb36c
https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j44h-fqhh-fh28
https://www.vulncheck.com/advisories/shescape-before-home-directory-disclosure-via-busybox

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 22:16

Updated : 2026-08-31 15:17

NVD link : CVE-2026-73055

Mitre link : CVE-2026-73055

CVE.ORG link : CVE-2026-73055

JSON object : View

Products Affected

No product.

CWE

CWE-116

Improper Encoding or Escaping of Output

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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