Arbitrary file write via unchecked output path
Published May 4, 2026 · Updated May 4, 2026
Path traversal in EvoMap Evolver before 1.69.3 allows remote authenticated users to write files through a crafted fetch --out path. The fetch handler in index.js strips the --out= prefix and passes the remaining user-controlled path directly to recursive directory creation and skill-file writes without restricting resolution to the intended skills directory. Exploitation requires access to invoke the fetch command and write permission under the Evolver process account; resulting writes can overwrite application, configuration, or system files within that account's permissions.
Summary
What happened
Path traversal in EvoMap Evolver before 1.69.3 allows remote authenticated users to write files through a crafted fetch --out path. The fetch handler in index.js strips the --out= prefix and passes the remaining user-controlled path directly to recursive directory creation and skill-file writes without restricting resolution to the intended skills directory. Exploitation requires access to invoke the fetch command and write permission under the Evolver process account; resulting writes can overwrite application, configuration, or system files within that account's permissions.
The record
- CVE
- CVE-2026-42075
- Published
- May 4, 2026
- Updated
- May 4, 2026
- Vendor
- EvoMap
- Product
- Evolver
- Classifications
- CWE-22, T1105
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 4, 2026CVE publishedPublication date reported by the CVE source.
- May 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.
- Affected versionversion=< 1.69.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- GHSA-r466-rxw4-3j9j path-traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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