Vulnerability
CVE-2026-6103
Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.
- Sharing
- PUBLIC-OSINT
- Confidence
- 100
- Source
- The CVE Program
- Updated
- 26/09/2026 05:34
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.
Aliases and classifications
CWE-190Integer Overflow or Wraparound
Minimised technical details
No raw data- cisa kev
- False
- cvss score
- 4.3
- cvss vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
- cvss severity
- MEDIUM
Provenance
Public references
EudorIA correlation
Intel catalogue
The vulnerability is also available in the EudorIA editorial catalogue.
Open EudorIA analysisPresence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.