CVE-2026-6103 Affecting php-7.2 package, versions <7.2.34+e1


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-ECHOLATEST-PHP72-21716718
  • published26 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-6103  (opens in a new tab)

How to fix?

Upgrade Echo:latest php-7.2 to version 7.2.34+e1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-7.2 package and not the php-7.2 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1