CVE catalog

CVE-2026-12064

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: Jun 23, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.41% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	curl	sid	`8.23.0-1`	fixed
Debian	curl	forky	`8.22.0-1`	fixed
Debian	curl	trixie	`8.14.1-2+deb13u5`	vulnerable
Debian	curl	trixie-security	`8.14.1-2+deb13u7`	vulnerable
Debian	curl	bookworm	`7.88.1-10+deb12u15`	vulnerable
Debian	curl	bookworm-security	`7.88.1-10+deb12u5`	vulnerable
Cpe	curl	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	libcurl3t64-gnutls	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	libcurl4-doc	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	libcurl4-gnutls-dev	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	libcurl4-openssl-dev	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	libcurl4t64	Not reported	`8.5.0-2ubuntu10.11`	fixed
Cpe	curl	Not reported	Not reported	vulnerable
Cpe	curl	Not reported	`8.21.0`	fixed
Cpe	curl	Not reported	`8.21.0`	fixed
Alpine	curl	3.23	`8.22.0-r0`	fixed
Alpine	curl	3.24	`8.21.0-r0`	fixed
Ubuntu	curl	25.10	`8.12.1-3ubuntu1`	vulnerable
Ubuntu	curl	25.10	`8.13.0-5ubuntu1`	vulnerable
Ubuntu	curl	25.10	`8.14.1-1ubuntu2`	vulnerable
Ubuntu	curl	25.10	`8.14.1-1ubuntu3`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1.1`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1.2`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1.3`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1.4`	vulnerable
Ubuntu	curl	25.10	`8.14.1-2ubuntu1.5`	fixed
Ubuntu	curl	26.04	`8.14.1-2ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.17.0-1ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.2`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.3`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	curl	source	sid	`8.21.0~rc3-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	forky	`8.21.0~rc3-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	curl	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	libcurl3t64-gnutls	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	libcurl4-doc	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	libcurl4-gnutls-dev	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	libcurl4-openssl-dev	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	libcurl4t64	cpe	Not reported	`8.5.0-2ubuntu10.11`	Not reported	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.21.0`	Not reported	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.21.0`	Not reported	NVD-CVE-2026-12064	Not reported
Alpine	curl	apk	3.23	`8.22.0-r0`	Not reported	ALPINE-CVE-2026-12064	Not reported
Alpine	curl	apk	3.24	`8.21.0-r0`	Not reported	ALPINE-CVE-2026-12064	Not reported
Ubuntu	curl	deb	25.10	`8.14.1-2ubuntu1.5`	Not reported	UBUNTU-CVE-2026-12064	Not reported
Ubuntu	curl	deb	26.04	`8.18.0-1ubuntu2.3`	Not reported	UBUNTU-CVE-2026-12064	Not reported

Notes

[trixie] curl: Minor issue [bookworm] curl: Minor issue; needs schemeless URL with --proto-default sftp/scp

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[curl]Affected
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl3-gnutls]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl3-nss]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-doc]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · all · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · all · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-nss-dev]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-openssl-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  nvd · curl · debian · bookworm; nvd · curl · debian · 12

[Debian 13 (Trixie)]

[curl]Affected
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  nvd · curl · debian · 13
[libcurl3t64-gnutls]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  nvd · curl · debian · 13
[libcurl4-doc]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · all · trixie-security
  Affected
  nvd · curl · debian · 13
[libcurl4-gnutls]Affected
Source package: [curl]
Details (2)
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
[libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  nvd · curl · debian · 13
[libcurl4-openssl-dev]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  nvd · curl · debian · 13
[libcurl4t64]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  nvd · curl · debian · 13

Observed: Oct 27, 2026, 7:14:03 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]