Is CVE-2026-86419 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-86419 being exploited in the wild.

How severe is CVE-2026-86419?

Critical severity, with a CVSS score of 9.1, published 7 September 2026.

Is there a fix for CVE-2026-86419?

A patch was published on 2026-08-19: Security fixes committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-86419 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-86419?

Check whether you run Misp 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.

CVE-2026-86419: MISP SSRF and credential exposure in feed retrieval and TAXII discovery

CVE-2026-86419 · Severity: critical · CVSS 9.1 · Published 2026-09-07

MISP is an open-source threat intelligence platform used by organizations to share and analyze malware and security indicators. The vulnerability allows an attacker to exploit feed retrieval and TAXII discovery endpoints to access internal network resources, bypass server-side access controls, and steal authentication credentials configured for feed sources. An attacker could redirect legitimate feed requests to internal systems or use crafted DNS names to map to internal IP addresses, potentially exposing sensitive threat intelligence or gaining access to internal infrastructure.

Technologies: Misp. Vendors: Misp.

Quick answers

Is CVE-2026-86419 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-86419 being exploited in the wild.
How severe is CVE-2026-86419?: Critical severity, with a CVSS score of 9.1, published 7 September 2026.
Which products and versions are affected?: Misp ≤2.5.45.
Is there a fix for CVE-2026-86419?: A patch was published on 2026-08-19: Security fixes committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-86419 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-86419?: Check whether you run Misp 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

This is a server-side request forgery (SSRF) vulnerability with credential exposure in MISP's feed retrieval and TAXII discovery features. In feed processing, HTTP redirects were followed without validating the redirect scheme or destination, and original request headers (including authentication credentials) were reused across redirect hops, allowing them to be forwarded to attacker-controlled hosts. The TAXII discovery endpoint used incomplete host validation that only compared resolved IPs against a few literal addresses, missing IPv6 loopback (::1), alternate numeric encodings (0x7f000001), and DNS records with multiple IPs. An attacker can craft malicious feeds or TAXII configurations to trigger requests to internal network resources. The fix adds redirect validation with scheme checking, blocks internal destinations on cross-host redirects, strips feed credentials before following redirects, and moves TAXII discovery to a shared egress validator with comprehensive address-space validation and DNS-pinning.

Affected products

MISP MISP ≤2.5.45

Timeline

2026-09-07: disclosed
2026-08-19: patched: Security fixes committed to repository

References

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