CVE-2026-48051 Papra: SSRF via HTTP redirect bypass in webhook delivery
Authenticated users can bypass SSRF protections via HTTP redirects to access internal network resources in Papra.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48051?
CVE-2026-48051 is a low-severity server-side request forgery vulnerability in papra-hq papra, published on 27 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Papra is a minimalistic document management and archiving platform. Prior to version 26.5.0, Papra's webhook delivery system contains an SSRF protection bypass that allows any authenticated organisation member to cause the server to make HTTP requests to internal addresses — loopback, link-local, and RFC-1918 ranges. The SSRF protection validates the registered webhook URL but ignores redirect destinations. The HTTP client (ofetch) follows 3xx responses automatically, and the redirect target is never checked against the blocklist. An attacker registers a webhook pointing to an attacker-controlled server, which redirects incoming POSTs to any internal address. Exploitation was confirmed by live test against the official Docker image. The fix is a single-line change to the webhook HTTP client. This issue has been patched in version 26.5.0.
Weakness: CWE-918
Which versions are affected by CVE-2026-48051?
2 open source packages ship an affected version, including @papra/webhooks.
| Package | Affected | Fixed in |
|---|---|---|
@papra/webhooks npm | All versions | 0.3.3 |
@papra/webhooks npm | All versions | 0.3.3 |
How do I fix CVE-2026-48051?
Upgrade @papra/webhooks to 0.3.3 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-48051 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48051 exists.
Sources
Also known as GHSA-5g86-85rp-f9hx.