CVE-2026-39361Public exploitNetwork attack vector

Authenticated SSRF via bracketed IPv6 host parsing

Published Apr 7, 2026 · Updated Apr 7, 2026

SSRF in OpenObserve 0.70.3 and earlier allows remote authenticated users to read internal resources via crafted enrichment URLs. validate_enrichment_url compares bracketed IPv6 hosts with unbracketed literals and passes them unchanged to IP-address parsing, so both checks fail. Any authenticated user who can submit an enrichment-table URL can access loopback, private-network, or cloud metadata services and read returned data.

CVSS severity7.7
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in OpenObserve 0.70.3 and earlier allows remote authenticated users to read internal resources via crafted enrichment URLs. validate_enrichment_url compares bracketed IPv6 hosts with unbracketed literals and passes them unchanged to IP-address parsing, so both checks fail. Any authenticated user who can submit an enrichment-table URL can access loopback, private-network, or cloud metadata services and read returned data.

The record

CVE
CVE-2026-39361
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
OpenObserve
Product
OpenObserve
Classifications
CWE-918, CAPEC-664, T1046, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 0.70.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenObserve · OpenObserveversion=<= 0.70.3

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1046Network Service Discovery
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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