CVE-2026-39361 OpenObserve has a SSRF Protection Bypass via IPv6 Bracket Notation in validate_enrichment_url

High 7.7 Published 7 Apr 2026 Updated 9 Apr 2026

Authenticated attackers can bypass SSRF protections using IPv6 bracket notation to access internal services and retrieve cloud IAM credentials.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-39361?

CVE-2026-39361 is a high-severity server-side request forgery vulnerability in openobserve, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenObserve is a cloud-native observability platform. In 0.70.3 and earlier, the validate_enrichment_url function in src/handler/http/request/enrichment_table/mod.rs fails to block IPv6 addresses because Rust's url crate returns them with surrounding brackets (e.g. "[::1]" not "::1"). An authenticated attacker can reach internal services blocked from external access. On cloud deployments this enables retrieval of IAM credentials via AWS IMDSv1 (169.254.169.254), GCP metadata, or Azure IMDS. On self-hosted deployments it allows probing internal network services.

Weakness: CWE-918

Which versions are affected by CVE-2026-39361?

It affects 1 product.

Products include Openobserve Openobserve.

How do I fix CVE-2026-39361?

No fix has been published for CVE-2026-39361 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-39361 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39361 exists.

Sources

Also known as GHSA-gcwf-3p7h-wm79.