CVE search · CVE-2026-6103
CVE-2026-6103
low 3.3
phar_tar_number() parses the octal size field of a TAR header into a uint32_t with no overflow check. The field is 11 octal digits wide and holds values up to 0x1FFFFFFFF, so a size above 0xFFFFFFFF silently wraps. The parser then skips the wrong number of data blocks and interprets attacker-controlled file content as the next TAR header, which lets a crafted archive inject entries that PharData reports and extracts as if they were genuine.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- security@php.net
- Weakness
- CWE-190
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 4.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
security@php.netSecondary |
| CVSS 3.1 | low 3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- php · php
References
- https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85Vendor AdvisoryExploit
- https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85Vendor AdvisoryExploit