All errata/c10f2/ALT-PU-2026-21800-4
ALT-PU-2026-21800-4

Package update curl in branch c10f2

Version8.12.1-alt3
Task#440707
Published2026-11-14
Max severityCRITICAL
Severity:

Closed issues (6)

BDU:2026-19003
CRITICAL9.1

Уязвимость программного средства для взаимодействия с серверами CURL, связанная с недостатками механизма аутентификации, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Published: 2026-11-11
CVSS 3.xCRITICAL 9.1
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0CRITICAL 9.4
CVSS:2.0/AV:N/AC:L/Au:N/C:C/I:C/A:N
References
BDU:2026-19007
HIGH8.1

Уязвимость программного средства для взаимодействия с серверами CURL, связанная с ошибками процедуры подтверждения подлинности сертификата, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Published: 2026-11-11
CVSS 3.xHIGH 8.1
CVSS:3.x/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0HIGH 8.5
CVSS:2.0/AV:N/AC:L/Au:S/C:C/I:C/A:N
References
CVE-2026-12064
HIGH7.5

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.

Published: 2026-07-03Modified: 2026-09-15
CVSS 3.xHIGH 7.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
CVE-2026-8927
CRITICAL9.1

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against `proxyA` using Digest auth, a subsequent transfer routed through `proxyB` erroneously leaks the `Proxy-Authorization:` header intended solely for `proxyA`.

Published: 2026-07-03Modified: 2026-09-15
CVSS 3.xCRITICAL 9.1
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
CVE-2026-9547
HIGH7.4

When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an untrusted server. This vulnerability occurs when a server presents a host key type that does not match the specific key type already recorded for that host in the `known_hosts` file. Instead of rejecting the mismatch, the callback mechanism fails to properly enforce the restriction, allowing the connection to succeed without warning and risking a potential man-in-the-middle attack.

Published: 2026-07-03Modified: 2026-09-15
CVSS 3.xHIGH 7.4
CVSS:3.x/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References