# CVE-2026-39361: OpenObserve SSRF bypass via IPv6 bracket notation in enrichment URLs

Source: https://junglewise.ai/threats/cve-2026-39361-openobserve-ssrf-bypass-via-ipv6-bracket-notation-in-enrichment  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-07. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-39361 · Severity: high · CVSS 7.7 · Published 2026-04-07

OpenObserve is a cloud-native observability platform used for log and metric analysis. A security flaw allows logged-in users to bypass network restrictions and force the server to make requests to internal systems. This could allow an attacker to steal sensitive cloud credentials (like AWS IAM roles) or probe private internal network services that are not supposed to be accessible from the internet.

Technologies: [Openobserve](https://junglewise.ai/threats/technologies/openobserve). Vendors: [Openobserve](https://junglewise.ai/threats/vendors/openobserve).

## Quick answers

**Is CVE-2026-39361 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39361 being exploited in the wild.

**How severe is CVE-2026-39361?** High severity, with a CVSS score of 7.7, published 7 April 2026.

**Which products and versions are affected?** Openobserve <= 0.70.3.

**Is there a fix for CVE-2026-39361?** A patch was published on 2026-04-07: Fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39361 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-39361?** Check whether you run Openobserve at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Server-Side Request Forgery (SSRF) vulnerability exists in the `validate_enrichment_url` function within `src/handler/http/request/enrichment_table/mod.rs`. The root cause is a failure to account for the bracket notation used for IPv6 addresses in Rust's `url` crate (e.g., "[::1]" instead of "::1"). Because the validation logic compares the host string directly and attempts to parse it as an IP address without stripping brackets, it fails to identify loopback, private, or link-local addresses. An authenticated attacker can use payloads like `http://[::ffff:169.254.169.254]/` to bypass blocklists and reach internal network services or cloud metadata services (IMDS). A patch has been committed to enhance URL validation by stripping brackets before performing IP checks.

## Affected products

- OpenObserve OpenObserve <= 0.70.3

## Timeline

- 2026-04-07: advisory: GitHub Security Advisory published
- 2026-04-07: disclosed
- 2026-04-07: patched: Fix committed to repository

## References

- [https://github.com/openobserve/openobserve/commit/d1a5d8f65b432e2e82f83231390dec7f107e8d75](https://github.com/openobserve/openobserve/commit/d1a5d8f65b432e2e82f83231390dec7f107e8d75)
- [https://github.com/openobserve/openobserve/security/advisories/GHSA-gcwf-3p7h-wm79](https://github.com/openobserve/openobserve/security/advisories/GHSA-gcwf-3p7h-wm79)

## Related threats

- [OpenObserve authentication bypass with empty password](https://junglewise.ai/threats/cve-2026-126065-openobserve-is-a-cloud-native-observability-platform-prior-to-1)
- [OpenObserve unauthenticated config endpoint information disclosure](https://junglewise.ai/threats/cve-2026-63645-openobserve-is-a-cloud-native-observability-platform-prior-to-0)