Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
PHP security vulnerability CVE-2026-6103 affects PHP 8.2 and 8.4. If you run either in production, update to the patched version ASAP. Need help upgrading your server or applying patches? Let me know, happy to help. 🔒 #PHP #Security #InfoSec
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | php | php | - | - | - |