CVE-2026-25145

Host file disclosure via license-path traversal

Published Feb 4, 2026 · Updated Feb 4, 2026

Path traversal in Chainguard melange 0.14.0 through 0.40.2 allows attackers to read arbitrary host files via crafted build configurations. LicensingInfos joins copyright[].license-path to the workspace without rejecting parent-directory segments, then embeds the file contents as SBOM license text. An attacker must influence a configuration processed by a CI or build service, and disclosure is limited to files readable by the melange process.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Chainguard melange 0.14.0 through 0.40.2 allows attackers to read arbitrary host files via crafted build configurations. LicensingInfos joins copyright[].license-path to the workspace without rejecting parent-directory segments, then embeds the file contents as SBOM license text. An attacker must influence a configuration processed by a CI or build service, and disclosure is limited to files readable by the melange process.

The record

CVE
CVE-2026-25145
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
Chainguard
Product
Melange
Classifications
CWE-200, CWE-22, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=>= 0.14.0, < 0.40.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Chainguard · Melangeversion=>= 0.14.0, < 0.40.3

Published CVSS scores

5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

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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