How severe is CVE-2026-39361?

CVE-2026-39361 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-39361 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39361?

CVE-2026-39361 affects Openobserve. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39361?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39361 have an EU (EUVD) identifier?

Yes. CVE-2026-39361 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19869.

When was CVE-2026-39361 published?

CVE-2026-39361 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-39361

CVE-2026-39361 is a high-severity vulnerability in Openobserve with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19869
Weakness: CWE-918
Affected product: Openobserve
Published: 2026-04-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-39361?: 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.
How severe is CVE-2026-39361?: CVE-2026-39361 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-39361 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39361?: CVE-2026-39361 affects Openobserve. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39361?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39361 have an EU (EUVD) identifier?: Yes. CVE-2026-39361 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19869.
When was CVE-2026-39361 published?: CVE-2026-39361 was published on 2026-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openobserve:openobserve:*:*:*:*:*:*:*:*

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