CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.
Affected products
php: archive tar; debian: debian linux; fedoraproject: fedora; drupal: drupal
References10
- github.com/pear/Archive_Tar/issues/33 ExploitIssue TrackingVendor Advisory
- github.com/pear/Archive_Tar/issues/33 ExploitIssue TrackingVendor Advisory
- packetstormsecurity.com/files/161095/PEAR-Archive_Tar-Arbitrary… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/161095/PEAR-Archive_Tar-Arbitrary… ExploitThird Party AdvisoryVDB Entry
- lists.debian.org/debian-lts-announce/2020/11/msg00045.html Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 85% percentile: 100 · as of 2 November 2026
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