Phar decompression loops forever on crafted gzip "quine" files, causing a denial of service.
Affected versions
| Branch | Affected | Fixed in |
|---|---|---|
| PHP 8.1 | < 8.1.11 | 8.1.11 |
| PHP 8.0 | < 8.0.24 | 8.0.24 |
| PHP 7.4 | < 7.4.31 | 7.4.31 |
Older branches: not assessed
Exploitation conditions
- Processing an untrusted phar archive
Remediation
Upgrade to 7.4.31, 8.0.24, 8.1.11 or a later release of your branch. If your branch is end-of-life, move to a supported branch. Distribution packages may carry a backported fix under an older version number; confirm with your vendor's security tracker.
A version number alone cannot prove patch status. Linux distributions and hosting providers often backport security fixes without changing the version. Check your vendor’s changelog.
Severity scores
| CVSS | Source | Vector |
|---|---|---|
| 5.5 v3.1 | NVD | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
Data provenance
Secondary sources · pending primary verificationLast reviewed: Oct 24, 2026 · Source