All errata/sisyphus/ALT-PU-2026-8697-3
ALT-PU-2026-8697-3

Package update portainer-agent in branch sisyphus

Version2.39.3-alt1
Task#420079
Published2026-06-25
Max severityCRITICAL
Severity:

Closed issues (17)

BDU:2026-04597
HIGH7.5

Уязвимость библиотеки net/http2 языка программирования Go, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-04-02Modified: 2026-04-26
CVSS 3.xHIGH 7.5
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0HIGH 7.8
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:C
References
BDU:2026-08587
HIGH7.5

Уязвимость реализации протокола HTTP/2 языка программирования Go, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-06-22
CVSS 3.xHIGH 7.5
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0HIGH 7.8
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:C
References
CVE-2026-33762
LOW2.8

go-git is an extensible git implementation library written in pure Go. Prior to version 5.17.1, go-git’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing. This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue. This issue has been patched in version 5.17.1.

Published: 2026-03-31Modified: 2026-06-17
CVSS 3.xLOW 2.8
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
References
CVE-2026-39830
CRITICAL9.1

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

Published: 2026-05-22Modified: 2026-06-17
CVSS 3.xCRITICAL 9.1
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
References
CVE-2026-39831
CRITICAL9.1

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

Published: 2026-05-22Modified: 2026-06-17
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-2026-39832
CRITICAL9.1

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Published: 2026-05-22Modified: 2026-06-17
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-2026-39833
CRITICAL9.1

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

Published: 2026-05-22Modified: 2026-06-17
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-2026-39834
CRITICAL9.1

When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.

Published: 2026-05-22Modified: 2026-06-17
CVSS 3.xCRITICAL 9.1
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
References
CVE-2026-41506
HIGH7.4

go-git is an extensible git implementation library written in pure Go. Prior to versions 5.18.0 and 6.0.0-alpha.2, go-git may leak HTTP authentication credentials when following redirects during smart-HTTP clone and fetch operations. This issue has been patched in versions 5.18.0 and 6.0.0-alpha.2.

Published: 2026-05-08Modified: 2026-06-17
CVSS 3.xHIGH 7.4
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
References
CVE-2026-46595
CRITICAL10.0

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.

Published: 2026-05-22Modified: 2026-06-17
CVSS 3.xCRITICAL 10.0
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
References
GHSA-3xc5-wrhm-f963
MEDIUM4.7

go-git: Credential leak via cross-host redirect in smart HTTP transport

Published: 2026-04-17Modified: 2026-05-12
CVSS 3.xMEDIUM 4.7
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
References