CVE-2020-28949
CISA KEVPublished August 25, 2022 · Updated April 3, 2026
high
Official 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.
Affected Products
| Vendor | Product |
|---|---|
| PEAR | Archive_Tar |
Patch Status
Patch by 2022-09-15
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2020-28949.