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CVE

CVE-2026-73055

Shescape before 2.1.15 Home Directory Disclosure via BusyBox
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CVE

CVE-2026-73055

Shescape before 2.1.15 Home Directory Disclosure via BusyBox

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73055.json, https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j44h-fqhh-fh28, https://nvd.nist.gov/vuln/detail/CVE-2026-73055, https://www.vulncheck.com/advisories/shescape-before-home-directory-disclosure-via-busybox, https://github.com/ericcornelissen/shescape/commit/7cba30594c16a21524706efe2f6c6c9d8923f411, https://github.com/ericcornelissen/shescape/commit/d86bf2ae22961c73458bddf70dd06adf9dadb36c

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00207%
EPSS Percentile
0.10695%
Introduced Version
0
Fix Available
107771e62c86af15fdb2638189ed329ed26c24d3

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