CVE-2026-35461: CWE-918: Server-Side Request Forgery (SSRF) in papra-hq papra
Papra is a minimalistic document management and archiving platform. Prior to 26.4.0, the Papra webhook system allows authenticated users to register arbitrary URLs as webhook endpoints with no validation of the destination address. The server makes outbound HTTP POST requests to registered URLs, including localhost, internal network ranges, and cloud provider metadata endpoints, on every document event. This vulnerability is fixed in 26.4.0.
AI Analysis
Technical Summary
Papra versions before 26.4.0 allow authenticated users to register webhook endpoints with no validation of the destination URL. The server then performs outbound HTTP POST requests to these URLs on document events, including requests to localhost, internal network ranges, and cloud provider metadata endpoints. This behavior enables SSRF attacks, where an attacker can coerce the server into making requests to internal resources. The vulnerability is addressed in Papra 26.4.0.
Potential Impact
An attacker with authentication privileges can exploit this SSRF vulnerability to make the Papra server send HTTP POST requests to arbitrary internal or external endpoints. This could expose internal services or cloud metadata endpoints to unauthorized access or information disclosure. The impact is limited to confidentiality with no direct integrity or availability effects reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Upgrade Papra to version 26.4.0 or later, where the webhook URL validation is implemented to prevent SSRF. Since the vendor advisory confirms the vulnerability is fixed in 26.4.0, applying this official fix fully mitigates the issue. No additional mitigations are specified or required.
CVE-2026-35461: CWE-918: Server-Side Request Forgery (SSRF) in papra-hq papra
Description
Papra is a minimalistic document management and archiving platform. Prior to 26.4.0, the Papra webhook system allows authenticated users to register arbitrary URLs as webhook endpoints with no validation of the destination address. The server makes outbound HTTP POST requests to registered URLs, including localhost, internal network ranges, and cloud provider metadata endpoints, on every document event. This vulnerability is fixed in 26.4.0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Papra versions before 26.4.0 allow authenticated users to register webhook endpoints with no validation of the destination URL. The server then performs outbound HTTP POST requests to these URLs on document events, including requests to localhost, internal network ranges, and cloud provider metadata endpoints. This behavior enables SSRF attacks, where an attacker can coerce the server into making requests to internal resources. The vulnerability is addressed in Papra 26.4.0.
Potential Impact
An attacker with authentication privileges can exploit this SSRF vulnerability to make the Papra server send HTTP POST requests to arbitrary internal or external endpoints. This could expose internal services or cloud metadata endpoints to unauthorized access or information disclosure. The impact is limited to confidentiality with no direct integrity or availability effects reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Upgrade Papra to version 26.4.0 or later, where the webhook URL validation is implemented to prevent SSRF. Since the vendor advisory confirms the vulnerability is fixed in 26.4.0, applying this official fix fully mitigates the issue. No additional mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-02T19:25:52.193Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d51c3baaed68159a2c14f8
Added to database: 4/7/2026, 3:01:15 PM
Last enriched: 4/7/2026, 3:18:26 PM
Last updated: 4/8/2026, 2:03:41 AM
Views: 5
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