Skip to content
CVE PROGRAM SOURCE RECORD7.4 High

CVE-2026-87865

knownhost callback mismatches key as missing

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

curl curl

Default version status: unaffected

  • 8.22.0 to ≤ 8.22.0affected
  • 8.21.0 to ≤ 8.21.0affected
  • 8.20.0 to ≤ 8.20.0affected
  • 8.19.0 to ≤ 8.19.0affected
  • 8.18.0 to ≤ 8.18.0affected
  • 8.17.0 to ≤ 8.17.0affected
  • 8.16.0 to ≤ 8.16.0affected
  • 8.15.0 to ≤ 8.15.0affected
  • 8.14.1 to ≤ 8.14.1affected
  • 8.14.0 to ≤ 8.14.0affected
  • 8.13.0 to ≤ 8.13.0affected
  • 8.12.1 to ≤ 8.12.1affected
  • 8.12.0 to ≤ 8.12.0affected
  • 8.11.1 to ≤ 8.11.1affected
  • 8.11.0 to ≤ 8.11.0affected
  • 8.10.1 to ≤ 8.10.1affected
  • 8.10.0 to ≤ 8.10.0affected
  • 8.9.1 to ≤ 8.9.1affected
  • 8.9.0 to ≤ 8.9.0affected
  • 8.8.0 to ≤ 8.8.0affected
  • 8.7.1 to ≤ 8.7.1affected
  • 8.7.0 to ≤ 8.7.0affected
  • 8.6.0 to ≤ 8.6.0affected
  • 8.5.0 to ≤ 8.5.0affected
  • 8.4.0 to ≤ 8.4.0affected
  • 8.3.0 to ≤ 8.3.0affected
  • 8.2.1 to ≤ 8.2.1affected
  • 8.2.0 to ≤ 8.2.0affected
  • 8.1.2 to ≤ 8.1.2affected
  • 8.1.1 to ≤ 8.1.1affected
  • 8.1.0 to ≤ 8.1.0affected
  • 8.0.1 to ≤ 8.0.1affected
  • 8.0.0 to ≤ 8.0.0affected
  • 7.88.1 to ≤ 7.88.1affected
  • 7.88.0 to ≤ 7.88.0affected
  • 7.87.0 to ≤ 7.87.0affected
  • 7.86.0 to ≤ 7.86.0affected
  • 7.85.0 to ≤ 7.85.0affected
  • 7.84.0 to ≤ 7.84.0affected
  • 7.83.1 to ≤ 7.83.1affected
  • 7.83.0 to ≤ 7.83.0affected
  • 7.82.0 to ≤ 7.82.0affected
  • 7.81.0 to ≤ 7.81.0affected
  • 7.80.0 to ≤ 7.80.0affected
  • 7.79.1 to ≤ 7.79.1affected
  • 7.79.0 to ≤ 7.79.0affected
  • 7.78.0 to ≤ 7.78.0affected
  • 7.77.0 to ≤ 7.77.0affected
  • 7.76.1 to ≤ 7.76.1affected
  • 7.76.0 to ≤ 7.76.0affected
  • 7.75.0 to ≤ 7.75.0affected
  • 7.74.0 to ≤ 7.74.0affected
  • 7.73.0 to ≤ 7.73.0affected
  • 7.72.0 to ≤ 7.72.0affected
  • 7.71.1 to ≤ 7.71.1affected
  • 7.71.0 to ≤ 7.71.0affected
  • 7.70.0 to ≤ 7.70.0affected
  • 7.69.1 to ≤ 7.69.1affected

References