CVE-2025-67746Network attack vector

Terminal disruption via unsanitized remote-source output

Published Dec 30, 2025 · Updated Dec 30, 2025

ANSI sequence injection in Composer 2.0 through 2.2.25 and 2.3 through 2.9.2 allows remote attackers to manipulate terminal output. ConsoleIO writes messages and prompts without stripping control characters, while Auditor renders untrusted advisory and package fields directly into tables. Attackers must control a source that Composer downloads from; successful injection mangles display content and can interrupt the terminal application.

CVSS severity4.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ANSI sequence injection in Composer 2.0 through 2.2.25 and 2.3 through 2.9.2 allows remote attackers to manipulate terminal output. ConsoleIO writes messages and prompts without stripping control characters, while Auditor renders untrusted advisory and package fields directly into tables. Attackers must control a source that Composer downloads from; successful injection mangles display content and can interrupt the terminal application.

The record

CVE
CVE-2025-67746
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
Composer
Product
Composer
Classifications
CWE-74
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0, < 2.2.26
  2. Affected versionversion=>= 2.3, < 2.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Composer · Composerversion=>= 2.0, < 2.2.26; version=>= 2.3, < 2.9.3

Published CVSS scores

1.3GitHub, Inc.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
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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