PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-39361 openobserve CVE debrief

The OpenObserve cloud-native observability platform is vulnerable to an issue in version 0.70.3 and earlier. The validate_enrichment_url function fails to block IPv6 addresses due to Rust's url crate returning them with surrounding brackets. An authenticated attacker can reach internal services blocked from external access, potentially retrieving IAM credentials via cloud metadata services or probing internal network services.

Vendor
openobserve
Product
Unknown
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-07
Original CVE updated
2026-07-24
Advisory published
2026-04-07
Advisory updated
2026-07-24

Who should care

Users of OpenObserve version 0.70.3 and earlier, especially those with cloud deployments or self-hosted installations with internal services, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability lies in the validate_enrichment_url function in src/handler/http/request/enrichment_table/mod.rs. Due to the handling of IPv6 addresses by Rust's url crate, an authenticated attacker can bypass restrictions and access internal services. This could lead to unauthorized retrieval of IAM credentials in cloud environments or probing of internal network services in self-hosted deployments.

Defensive priority

High priority should be given to updating OpenObserve to a version beyond 0.70.3. In the meantime, additional monitoring and restrictions on internal service access should be implemented.

Recommended defensive actions

  • Update OpenObserve to a version beyond 0.70.3
  • Implement additional monitoring for internal service access
  • Restrict access to internal services where possible
  • Review and update IAM credential management policies
  • Consider compensating controls for cloud metadata services

Evidence notes

The CVE record was published on 2026-04-07T20:16:29.837Z and was last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Analyzed. Evidence is based on official CVE and NVD records, as well as vendor advisories from GitHub.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-07T20:16:29.837Z and has not been modified since then. The NVD entry is currently Analyzed.