CVE-2026-6103
EUVD-2026-8732225.09.2026, 21:17
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.Enginsight
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| php | php | 8.2.* ≤ 𝑥 < 8.2.34 | CNA |
| php | php | 8.3.* ≤ 𝑥 < 8.3.35 | CNA |
| php | php | 8.4.* ≤ 𝑥 < 8.4.26 | CNA |
| php | php | 8.5.* ≤ 𝑥 < 8.5.11 | CNA |
Debian Releases
Ubuntu Releases
Ubuntu Product | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| php5 |
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| php7.0 |
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| php7.2 |
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| php7.4 |
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| php8.1 |
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| php8.3 |
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| php8.5 |
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Vulnerability Media Exposure