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CVE-2026-87861

UnknownEPSS 0.29%

Last modified

CVE-2026-87861 is a vulnerability of currently unknown severity. When using ambient user credentials, an HTTP request directed to one origin may be dispatched over a connection previously authenticated via Negotiate for a different origin, leaving the request's intended credentials unused.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

When using ambient user credentials, an HTTP request directed to one origin may be dispatched over a connection previously authenticated via Negotiate for a different origin, leaving the request's intended credentials unused.

Metrics

EPSS Probability
0.29%

20.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
curlcurl>= 8.22.0, <= 8.22.0; >= 8.21.0, <= 8.21.0

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-87861?
When using ambient user credentials, an HTTP request directed to one origin may be dispatched over a connection previously authenticated via Negotiate for a different origin, leaving the request's intended credentials unused.
How severe is CVE-2026-87861?
Severity scoring for CVE-2026-87861 is pending analysis. The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-87861?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST