CVE-2025-67746CWE-74

Composer vulnerable to ANSI sequence injection

Low · published December 30, 2025

CVSS v4.0
1.3
EPSS
0%
Percentile
38.4
In the wild
Unconfirmed
What it is

Composer is a dependency manager for PHP. In versions on the 2.x branch prior to 2.2.26 and 2.9.3, attackers controlling remote sources that Composer downloads from might in some way inject ANSI control characters in the terminal output of various Composer commands, causing mangled output and potentially leading to confusion or DoS of the terminal application. There is no proven exploit and this has thus a low severity but we still publish a CVE as it has potential for abuse, and we want to be on the safe side informing users that they should upgrade. Versions 2.2.26 and 2.9.3 contain a patch for the issue.

The record
Technical detail
CVSS v4.0
1.3 · LOW
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
EPSS
0.00453 · 38.4th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2025-12-30T16:11Z
EPSS history
Timeline
  • 30 DEC 16:11Z
    Composer vulnerable to ANSI sequence injection
    cvelistv5