Internal data disclosure via unresolved fetch destinations
Published Aug 24, 2026 · Updated Aug 24, 2026
Server-side request forgery in Hugo 0.91.0 through 0.165.0 allows remote attackers to read internal endpoint responses via crafted content URLs. CheckAllowedHTTPURL validates URL text but neither resolves hostnames nor checks the address selected by the HTTP client at connection time. Attacker-controlled content or a CMS field must reach resources.GetRemote; the private response is then embedded in the generated site and published with the build output.
Summary
What happened
Server-side request forgery in Hugo 0.91.0 through 0.165.0 allows remote attackers to read internal endpoint responses via crafted content URLs. CheckAllowedHTTPURL validates URL text but neither resolves hostnames nor checks the address selected by the HTTP client at connection time. Attacker-controlled content or a CMS field must reach resources.GetRemote; the private response is then embedded in the generated site and published with the build output.
The record
- CVE
- CVE-2026-10582
- Published
- Aug 24, 2026
- Updated
- Aug 24, 2026
- Vendor
- Hugo Authors
- Product
- Hugo
- Classifications
- CWE-918
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 24, 2026CVE publishedPublication date reported by the CVE source.
- Aug 24, 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=0.91.0 <=0.165.0
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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