Dashboard / CVE-2026-77156

CVE-2026-77156

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 48/100
Published: 2026-10-22 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity

CVSS Vector Breakdown

AV: Network
AC: Low
PR: High
UI: Passive
S: X
AT: None
VC: None
VI: None
VA: None

Description

Incomplete validation of extracted archive entry paths in ast-cli's tar extraction logic on Linux and macOS (used when installing the Vorpal ASCA real-time engine and the SCA Resolver) would allow a malicious tar archive containing absolute or traversal path entries to write files outside the install directory. Windows builds were not affected, as the Windows extractor performs this path validation. Exploitation required substituting the archive served at "download.checkmarx.com". An attacker able to compromise that server and replace the archive could write arbitrary, executable files to arbitrary filesystem paths via this path traversal. Extraction now validates that each entry's destination path resolves within the working directory and rejects absolute paths.

Weakness Classification (1)

References & Advisories (2)

Bug Bounty Relevance

48 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

6.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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

EPSS — Exploitation Probability

0.35%
Raw Score 0.003490
Percentile 28.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00349
2026-10-28
0.00349

Intelligence Sources

nvd ref →

External Links