Authenticated internal service access via unvalidated redirects
Published May 26, 2026 · Updated May 26, 2026
Server-side request forgery in Karakeep before 0.32.0 allows remote authenticated users to reach internal HTTP services through redirects. The crawler and video download workers validate the initial URL but follow attacker-controlled redirect destinations without consistently revalidating them. Any authenticated user who can create a link bookmark can make the workers issue requests to Docker-network services, exposing whatever internal HTTP endpoints the deployment makes reachable.
Summary
What happened
Server-side request forgery in Karakeep before 0.32.0 allows remote authenticated users to reach internal HTTP services through redirects. The crawler and video download workers validate the initial URL but follow attacker-controlled redirect destinations without consistently revalidating them. Any authenticated user who can create a link bookmark can make the workers issue requests to Docker-network services, exposing whatever internal HTTP endpoints the deployment makes reachable.
The record
- CVE
- CVE-2026-45082
- Published
- May 26, 2026
- Updated
- May 26, 2026
- Vendor
- Localhost Labs Ltd
- Product
- Karakeep
- Classifications
- CWE-918
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 26, 2026CVE publishedPublication date reported by the CVE source.
- May 26, 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=< 0.32.0
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
- GitHub advisory redirect-chain proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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