August 25, 2022 · Applied Cybernetics Group
CVE-2020-28949 — PEAR Archive_Tar
PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability
- Added to KEV
2022-08-25- Federal due date
2022-09-15- Vendor
- PEAR
- Product
- Archive_Tar
- EPSS
- 99.8th percentile (score 0.934, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-28949
CISA short description
PEAR Archive_Tar allows an unserialization attack because phar: is blocked but PHAR: is not blocked. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.
Required action
Apply updates per vendor instructions.