CVE-2025-61557Network attack vector

File disclosure via traversing source request paths

Published Dec 30, 2025 · Updated Dec 30, 2025

Path traversal in nixseparatedebuginfod before 0.4.1 allows remote attackers to read server files through crafted source paths. The source-file endpoint accepts parent-directory segments after a valid Nix store path and resolves the request without confirming that the resulting path remains inside the store. The default NixOS service listens only on localhost and runs as a dedicated user, limiting disclosure to readable files; Internet-facing deployments expose every file readable by the service.

CVSS severity7.5
High
EPSS probability0.71%
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 nixseparatedebuginfod before 0.4.1 allows remote attackers to read server files through crafted source paths. The source-file endpoint accepts parent-directory segments after a valid Nix store path and resolves the request without confirming that the resulting path remains inside the store. The default NixOS service listens only on localhost and runs as a dedicated user, limiting disclosure to readable files; Internet-facing deployments expose every file readable by the service.

The record

CVE
CVE-2025-61557
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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