A one-byte buffer over-read in the convert.quoted-printable-decode stream filter can crash the process or leak memory.
Affected versions
| Branch | Affected | Fixed in |
|---|---|---|
| PHP 8.3 | < 8.3.14 | 8.3.14 |
| PHP 8.2 | < 8.2.26 | 8.2.26 |
| PHP 8.1 | < 8.1.31 | 8.1.31 |
Older branches: not assessed
Exploitation conditions
No special conditions are documented.
Remediation
Upgrade to 8.1.31, 8.2.26, 8.3.14 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 |
|---|---|---|
| 8.2 v3.1 | NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| 4.8 v3.1 | php-src | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L |
References
Data provenance
Secondary sources · pending primary verificationLast reviewed: Oct 24, 2026 · Source
Notes: NVD (8.2) and the PHP CNA (4.8) disagree on severity. PatchScope displays the higher rating.