Internal HTTP response disclosure via wildcard web_fetch policy
Published Jul 14, 2026 · Updated Jul 14, 2026
SSRF in web_fetch in mosaxiv Clawlet 0.2.0 through 0.2.10 allows remote authenticated users to read internal HTTP responses. The wildcard default host policy passes user-controlled HTTP or HTTPS URLs to http.Client.Do without rejecting loopback or private addresses, including after redirects. Reachability requires influence over a web_fetch invocation; successful requests expose response bodies from services reachable by the Clawlet host.
Summary
What happened
SSRF in web_fetch in mosaxiv Clawlet 0.2.0 through 0.2.10 allows remote authenticated users to read internal HTTP responses. The wildcard default host policy passes user-controlled HTTP or HTTPS URLs to http.Client.Do without rejecting loopback or private addresses, including after redirects. Reachability requires influence over a web_fetch invocation; successful requests expose response bodies from services reachable by the Clawlet host.
The record
- CVE
- CVE-2026-15620
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- mosaxiv
- Product
- Clawlet
- Classifications
- CWE-918, CAPEC-664, T1046
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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=0.2.0
- Affected versionversion=0.2.1
- Affected versionversion=0.2.10
- Affected versionversion=0.2.2
- Affected versionversion=0.2.3
- Affected versionversion=0.2.4
- Affected versionversion=0.2.5
- Affected versionversion=0.2.6
- Affected versionversion=0.2.7
- Affected versionversion=0.2.8
- Affected versionversion=0.2.9
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
- GitHub issue 14 loopback-canary reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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