CVE-2026-66484
NVD: GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. NVD: When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. NVD: A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the...
4.6 Severity
MEDIUM EPSS
0.0016 (5) KEV
-
Source-published summary
NVD: GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. NVD: When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. NVD: A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the...
Possible impact
Source describes path traversal review. Possible impact: An attacker may be able to reach files outside the intended application path.
Affected context
Affected product or version requires source confirmation.
Remediation / advisory
Patch confirmed by source text; fixed version context: commit.
Why it matters
Source describes path traversal review. Possible impact: An attacker may be able to reach files outside the intended application path.; CVSS 4.6 (MEDIUM); EPSS percentile 5; not listed in KEV; Patch confirmed by source text; fixed version context: commit; sources: NVD.
What to verify
Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.
Exposure hint
exposure unknown
Impact tags
Urgency reasons
Source-derived note
Summary derived from NVD description; unsafe procedural detail is not shown.
Redaction metadata
- source summary used
- True
- fallback summary used
- False
- unsafe procedural detail present
- false
- raw source displayed
- false
- public summary redacted
- true
Remediation handoff
Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.
Safety note
This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.