Description

A flaw in the curl command line tool's logic makes it only set SSH host verification options when interacting directly using SFTP or SCP, and not as a result of following a redirect.

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EPSS — Exploit Prediction

0.0077

Probability of exploitation

0.56%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://curl.se/docs/CVE-2026-86410.html https://curl.se/docs/CVE-2026-86410.json https://hackerone.com/reports/3973176

Frequently Asked Questions

What is CVE-2026-86410? +

A flaw in the curl command line tool's logic makes it only set SSH host verification options when interacting directly using SFTP or SCP, and not as a result of following a redirect.

How do I check if I'm vulnerable to CVE-2026-86410? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.