CVE-2026-87865
When libcurl uses libssh2 with a hashed `known_hosts` file, an unrelated initial entry can cause…
- Risk score
- 52/100
- CVSS
- 7.4 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 20 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- When libcurl uses libssh2 with a hashed known_hosts file, an unrelated initial entry can cause host key validation to report a key *mismatch* as a *missing* key to the CURLOPT_SSH_KEYFUNCTION callback.
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.4 high
- Remotely exploitable without logging in
References
Original description
When libcurl uses libssh2 with a hashed `known_hosts` file, an unrelated initial entry can cause host key validation to report a key *mismatch* as a *missing* key to the `CURLOPT_SSH_KEYFUNCTION` callback.
Last activity 20 Oct 2026. Patch Forecast updates every hour.