Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N H N 7.5 .0034 26.9 —
AFFECTED Product Versions Fixed curl 8.20.0 – —
TIMELINE Jun 12 Reserved by curl Jul 3 EXPLOIT PUBLISHED — CVE-2026-12064 (curl). Public exploit reference added. Jul 3 Published (CNA: curl)
When a user invokes curl using a schemeless URL combined with `--proto-default` sftp (or scp), a disconnect occurs between the tool layer and libcurl. The tool layer incorrectly infers the URL scheme, which erroneously bypasses the initialization of critical SSH security options like CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 and CURLOPT_SSH_KNOWNHOSTS. Conversely, the libcurl runtime successfully honors CURLOPT_DEFAULT_PROTOCOL and establishes the connection via SFTP/SCP as specified. Because the tool layer skipped the security configuration, these SSH host verification options are silently omitted, causing curl to connect to an unverified SSH remote host without throwing an error.
| Date | Event | Detail |
|---|---|---|
| June 12, 2026 | Reserved | Reserved by curl |
| July 3, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-12064 (curl). Public exploit reference added. |
| July 3, 2026 | Published | Published (CNA: curl) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| curl | curl | — | 8.20.0 | — |
Authoritative record: CVE-2026-12064 at cve.org
Vendors: curl
Weaknesses: CWE-295
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-12064 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.