CVE-2026-24137Network attack vector

Arbitrary file overwrite via unescaped cache paths

Published Jan 23, 2026 · Updated Jan 23, 2026

Path traversal in Sigstore sigstore framework 1.10.3 and earlier allows remote attackers to overwrite files via malicious TUF metadata. The legacy TUF diskCache.Set path joins a cache base with an unescaped metadata target name, letting traversal segments resolve outside the cache. Exploitation requires direct use of the legacy client with disk caching and control of trusted TUF metadata; public Sigstore deployment users are unaffected.

CVSS severity5.8
Medium
EPSS probability0.37%
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 Sigstore sigstore framework 1.10.3 and earlier allows remote attackers to overwrite files via malicious TUF metadata. The legacy TUF diskCache.Set path joins a cache base with an unescaped metadata target name, letting traversal segments resolve outside the cache. Exploitation requires direct use of the legacy client with disk caching and control of trusted TUF metadata; public Sigstore deployment users are unaffected.

The record

CVE
CVE-2026-24137
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
Sigstore
Product
sigstore framework
Classifications
CWE-22, T1195.002
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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=< 1.10.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Sigstore · sigstore frameworkversion=< 1.10.4

Published CVSS scores

5.8GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1195.002Supply Chain Compromise: Compromise Software Supply Chain

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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