CVE-2026-56854
CVE-2026-56854 · Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.
CVSS 7.5 · High · EPSS 0.4% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
golang.org/x/crypto/ssh
- Versions
- ≥ 0, < 0.55.0: Affected (semver)
Update to 0.55.0
golang-go.crypto Debian:12
- Versions
- 1:0.10.0-1
- 1:0.12.0-1
- 1:0.13.0-1
- 1:0.14.0-1
- 1:0.16.0-1
- 1:0.17.0-1
- 1:0.18.0-1
- 1:0.19.0-1
- 1:0.21.0-1
- 1:0.22.0-1
- 1:0.23.0-1
- 1:0.24.0-1
- 1:0.24.0-2
- 1:0.25.0-1
- 1:0.25.0-1~bpo12+1
- 1:0.33.0-1~exp1
- 1:0.36.0-1~exp1
- 1:0.4.0-1
- 1:0.41.0-1~exp1
- 1:0.42.0-1
- 1:0.42.0-1~exp1
- 1:0.42.0-2
- 1:0.42.0-3
- 1:0.42.0-4
- 1:0.43.0-1
- 1:0.43.0-2
- 1:0.45.0-1
- 1:0.46.0-1
- 1:0.47.0-1
- 1:0.50.0-1
- 1:0.52.0-1
- 1:0.52.0-1~bpo13+1
- 1:0.53.0-1
- 1:0.54.0-1
- 1:0.55.0-1
- 1:0.56.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Debian:13
- Versions
- 1:0.25.0-1
- 1:0.33.0-1~exp1
- 1:0.36.0-1~exp1
- 1:0.41.0-1~exp1
- 1:0.42.0-1
- 1:0.42.0-1~exp1
- 1:0.42.0-2
- 1:0.42.0-3
- 1:0.42.0-4
- 1:0.43.0-1
- 1:0.43.0-2
- 1:0.45.0-1
- 1:0.46.0-1
- 1:0.47.0-1
- 1:0.50.0-1
- 1:0.52.0-1
- 1:0.52.0-1~bpo13+1
- 1:0.53.0-1
- 1:0.54.0-1
- 1:0.55.0-1
- 1:0.56.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Debian:14
- Versions
- 1:0.25.0-1
- 1:0.33.0-1~exp1
- 1:0.36.0-1~exp1
- 1:0.41.0-1~exp1
- 1:0.42.0-1
- 1:0.42.0-1~exp1
- 1:0.42.0-2
- 1:0.42.0-3
- 1:0.42.0-4
- 1:0.43.0-1
- 1:0.43.0-2
- 1:0.45.0-1
- 1:0.46.0-1
- 1:0.47.0-1
- 1:0.50.0-1
- 1:0.52.0-1
- 1:0.52.0-1~bpo13+1
- 1:0.53.0-1
- 1:0.54.0-1
- Affected ranges
- ECOSYSTEM: < 1:0.55.0-1
Update to 1:0.55.0-1
golang-go.crypto Ubuntu:Pro:16.04:LTS
- Versions
- 1:0.0~git20150608-1
- 1:0.0~git20151201.0.7b85b09-2
- 1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm1
- 1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm2
- 1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
lxd Ubuntu:Pro:16.04:LTS
- Versions
- 0.20-0ubuntu4
- 0.21-0ubuntu3
- 0.21-0ubuntu5
- 0.22-0ubuntu1
- 0.22-0ubuntu2
- 0.23-0ubuntu1
- 0.23-0ubuntu2
- 0.23-0ubuntu3
- 0.24-0ubuntu2
- 0.24-0ubuntu3
- 0.24-0ubuntu4
- 0.25-0ubuntu1
- 0.26-0ubuntu2
- 0.26-0ubuntu3
- 0.27-0ubuntu1
- 0.27-0ubuntu2
- 2.0.0~beta1-0ubuntu3
- 2.0.0~beta1-0ubuntu4
- 2.0.0~beta2-0ubuntu1
- 2.0.0~beta2-0ubuntu2
- 2.0.0~beta3-0ubuntu1
- 2.0.0~beta3-0ubuntu2
- 2.0.0~beta3-0ubuntu3
- 2.0.0~beta3-0ubuntu4
- 2.0.0~beta4-0ubuntu1
- 2.0.0~beta4-0ubuntu2
- 2.0.0~beta4-0ubuntu3
- 2.0.0~beta4-0ubuntu4
- 2.0.0~beta4-0ubuntu5
- 2.0.0~beta4-0ubuntu6
- 2.0.0~beta4-0ubuntu7
- 2.0.0~rc1-0ubuntu1
- 2.0.0~rc1-0ubuntu2
- 2.0.0~rc1-0ubuntu3
- 2.0.0~rc2-0ubuntu2
- 2.0.0~rc2-0ubuntu3
- 2.0.0~rc3-0ubuntu1
- 2.0.0~rc3-0ubuntu2
- 2.0.0~rc3-0ubuntu3
- 2.0.0~rc3-0ubuntu4
- 2.0.0~rc4-0ubuntu1
- 2.0.0~rc5-0ubuntu1
- 2.0.0~rc6-0ubuntu1
- 2.0.0~rc6-0ubuntu2
- 2.0.0~rc7-0ubuntu1
- 2.0.0~rc7-0ubuntu2
- 2.0.0~rc8-0ubuntu1
- 2.0.0~rc8-0ubuntu2
- 2.0.0~rc8-0ubuntu3
- 2.0.0~rc8-0ubuntu5
- 2.0.0~rc8-0ubuntu6
- 2.0.0~rc8-0ubuntu7
- 2.0.0~rc9-0ubuntu2
- 2.0.0~rc9-0ubuntu3
- 2.0.0~rc9-0ubuntu4
- 2.0.0~rc9-0ubuntu5
- 2.0.0-0ubuntu1
- 2.0.0-0ubuntu2
- 2.0.0-0ubuntu3
- 2.0.0-0ubuntu4
- 2.0.1-0ubuntu1~16.04.1
- 2.0.2-0ubuntu1~16.04.1
- 2.0.3-0ubuntu1~ubuntu16.04.2
- 2.0.4-0ubuntu1~ubuntu16.04.1
- 2.0.5-0ubuntu1~ubuntu16.04.1
- 2.0.8-0ubuntu1~ubuntu16.04.1
- 2.0.8-0ubuntu1~ubuntu16.04.2
- 2.0.9-0ubuntu1~16.04.1
- 2.0.9-0ubuntu1~16.04.2
- 2.0.10-0ubuntu1~16.04.1
- 2.0.10-0ubuntu1~16.04.2
- 2.0.11-0ubuntu1~16.04.2
- 2.0.11-0ubuntu1~16.04.4
- 2.0.11-0ubuntu1~16.04.4+esm1
- 2.0.11-0ubuntu1~16.04.4+esm2
- 2.0.11-0ubuntu1~16.04.4+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:Pro:16.04:LTS
- Versions
- 1.9
- 1.9.1.1
- 1.9.2
- 2.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.5
- 2.0.8
- 2.0.9
- 2.0.10
- 2.11+0.16.04
- 2.12+0.16.04
- 2.13
- 2.14.2~16.04
- 2.15.2ubuntu1
- 2.16ubuntu3
- 2.17.1ubuntu1
- 2.20.1ubuntu1
- 2.21
- 2.22.2
- 2.22.3
- 2.22.6
- 2.23.1
- 2.24.1
- 2.25
- 2.26.10
- 2.27.5
- 2.28.5
- 2.29.4.2
- 2.32.3.2
- 2.32.9
- 2.33.1ubuntu2
- 2.34.2
- 2.34.2ubuntu0.1
- 2.37.4
- 2.37.4ubuntu0.1
- 2.38
- 2.39.2
- 2.39.2ubuntu0.2
- 2.40
- 2.42.1
- 2.45.1
- 2.45.1ubuntu0.2
- 2.46.1
- 2.47.1
- 2.48
- 2.48.3
- 2.54.3+16.04~esm2
- 2.54.3+16.04.0ubuntu0.1~esm3
- 2.54.3+16.04.0ubuntu0.1~esm4
- 2.54.3+16.04.0ubuntu0.1~esm5
- 2.54.3+16.04.0ubuntu0.1~esm6
- 2.61.4ubuntu0.16.04.1+esm1
- 2.61.4ubuntu0.16.04.1+esm2
- 2.61.4ubuntu0.16.04.1+esm4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:Pro:16.04:LTS
- Versions
- 20201217.02-0ubuntu1~16.04.0
- 20230426.00-0ubuntu2~16.04.3
- 20231004.02-0ubuntu1~16.04.1
- 20231004.02-0ubuntu1~16.04.2
- 20240716.00-0ubuntu1~16.04.0
- 20240716.00-0ubuntu1~16.04.0+esm1
- 20240716.00-0ubuntu1~16.04.0+esm2
- 20240716.00-0ubuntu1~16.04.0+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
lxd Ubuntu:Pro:18.04:LTS
- Versions
- 2.18-0ubuntu6
- 2.19-0ubuntu1
- 2.20-0ubuntu3
- 2.20-0ubuntu4
- 2.21-0ubuntu1
- 2.21-0ubuntu2
- 2.21-0ubuntu3
- 2.21-0ubuntu4
- 3.0.0~beta2-0ubuntu3
- 3.0.0~beta3-0ubuntu3
- 3.0.0~beta5-0ubuntu2
- 3.0.0~beta7-0ubuntu1
- 3.0.0-0ubuntu1
- 3.0.0-0ubuntu2
- 3.0.0-0ubuntu3
- 3.0.0-0ubuntu4
- 3.0.1-0ubuntu1~18.04.1
- 3.0.2-0ubuntu1~18.04.1
- 3.0.3-0ubuntu1~18.04.1
- 3.0.3-0ubuntu1~18.04.2
- 3.0.3-0ubuntu1~18.04.2+esm1
- 3.0.3-0ubuntu1~18.04.2+esm2
- 3.0.3-0ubuntu1~18.04.2+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:Pro:18.04:LTS
- Versions
- 2.28.5+17.10
- 2.29.4.1+18.04
- 2.29.4.2+18.04
- 2.31.1+18.04
- 2.32+18.04~pre5
- 2.32+18.04~pre6
- 2.32+18.04
- 2.32.3.2+18.04
- 2.32.5+18.04
- 2.32.8+18.04
- 2.32.9+18.04
- 2.33.1+18.04ubuntu2
- 2.34.2+18.04
- 2.34.2+18.04.1
- 2.37.1+18.04
- 2.37.1.1+18.04
- 2.37.4+18.04
- 2.37.4+18.04.1
- 2.38+18.04
- 2.39.2+18.04
- 2.40+18.04
- 2.42.1+18.04
- 2.45.1+18.04
- 2.45.1+18.04.2
- 2.46.1+18.04
- 2.47.1+18.04
- 2.48+18.04
- 2.48.3+18.04
- 2.49.2+18.04
- 2.51.1+18.04
- 2.54.2+18.04ubuntu1
- 2.54.3+18.04
- 2.54.3+18.04.2ubuntu0.1
- 2.54.3+18.04.2ubuntu0.2
- 2.55.5+18.04
- 2.57.5+18.04
- 2.57.5+18.04ubuntu0.1
- 2.58+18.04
- 2.58+18.04.1
- 2.61.4ubuntu0.18.04.1+esm1
- 2.61.4ubuntu0.18.04.1+esm2
- 2.61.4ubuntu0.18.04.1+esm4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Ubuntu:Pro:18.04:LTS
- Versions
- 1:0.0~git20170629.0.5ef0053-1ubuntu1
- 1:0.0~git20170629.0.5ef0053-1ubuntu2
- 1:0.0~git20170629.0.5ef0053-2
- 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm1
- 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2
- 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:Pro:18.04:LTS
- Versions
- 20201217.02-0ubuntu1~18.04.0
- 20210414.00-0ubuntu1~18.04.0
- 20210629.00-0ubuntu1~18.04.1
- 20220622.00-0ubuntu2~18.04.0
- 20220622.00-0ubuntu2~18.04.1
- 20230426.00-0ubuntu2~18.04.0
- 20231004.02-0ubuntu1~18.04.2
- 20231004.02-0ubuntu1~18.04.3
- 20240716.00-0ubuntu1~18.04.0
- 20241011.01-0ubuntu1~18.04.0
- 20241011.01-0ubuntu1~18.04.0+esm1
- 20241011.01-0ubuntu1~18.04.0+esm2
- 20241011.01-0ubuntu1~18.04.0+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:Pro:20.04:LTS
- Versions
- 20201217.02-0ubuntu1~20.04.0
- 20210414.00-0ubuntu1~20.04.0
- 20210629.00-0ubuntu1~20.04.0
- 20220622.00-0ubuntu2~20.04.0
- 20220622.00-0ubuntu2~20.04.2
- 20230426.00-0ubuntu2~20.04.0
- 20231004.02-0ubuntu1~20.04.1
- 20231004.02-0ubuntu1~20.04.2
- 20231004.02-0ubuntu1~20.04.3
- 20231004.02-0ubuntu1~20.04.4
- 20240716.00-0ubuntu1~20.04.0
- 20241011.01-0ubuntu1~20.04.1
- 20250116.00-0ubuntu1~20.04.0
- 20250116.00-0ubuntu1~20.04.0+esm1
- 20250116.00-0ubuntu1~20.04.0+esm2
- 20250116.00-0ubuntu1~20.04.0+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:Pro:20.04:LTS
- Versions
- 2.41+19.10.1
- 2.42.1+20.04
- 2.43.3+git1.8109f8
- 2.44~pre1+20.04
- 2.44+20.04
- 2.44.2+20.04
- 2.44.3+20.04
- 2.45.1+20.04
- 2.45.1+20.04.2
- 2.46.1+20.04
- 2.47.1+20.04
- 2.48+20.04
- 2.48.3+20.04
- 2.49.2+20.04
- 2.51.1+20.04ubuntu2
- 2.54.2+20.04ubuntu2
- 2.54.3+20.04
- 2.54.3+20.04.1
- 2.54.3+20.04.1ubuntu0.1
- 2.54.3+20.04.1ubuntu0.2
- 2.54.3+20.04.1ubuntu0.3
- 2.55.5+20.04
- 2.57.5+20.04
- 2.57.5+20.04ubuntu0.1
- 2.58+20.04
- 2.58+20.04.1
- 2.61.3+20.04
- 2.62+20.04
- 2.63+20.04
- 2.63+20.04ubuntu0.1
- 2.65.3+20.04
- 2.66.1+20.04
- 2.67.1+20.04
- 2.67.1+20.04ubuntu1~esm1
- 2.67.1+20.04ubuntu1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Ubuntu:Pro:20.04:LTS
- Versions
- 1:0.0~git20190701.4def268-2
- 1:0.0~git20200221.2aa609c-1
- 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm1
- 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm2
- 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:22.04:LTS
- Versions
- 20210629.00-0ubuntu1
- 20210629.00-0ubuntu2
- 20220104.00-0ubuntu1
- 20220104.00-0ubuntu2
- 20220622.00-0ubuntu2~22.04.0
- 20220622.00-0ubuntu2~22.04.1
- 20230426.00-0ubuntu2~22.04.0
- 20231004.02-0ubuntu1~22.04.1
- 20231004.02-0ubuntu1~22.04.2
- 20231004.02-0ubuntu1~22.04.3
- 20231004.02-0ubuntu1~22.04.4
- 20231004.02-0ubuntu1~22.04.5
- 20240716.00-0ubuntu1~22.04.0
- 20241011.01-0ubuntu1~22.04.0
- 20250116.00-0ubuntu1~22.04.0
- 20250116.00-0ubuntu1~22.04.1
- 20250116.00-0ubuntu1~22.04.2
- 20250116.00-0ubuntu1~22.04.3
- 20250116.00-0ubuntu1~22.04.4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:22.04:LTS
- Versions
- 2.53+21.10ubuntu1
- 2.54.2+22.04ubuntu1
- 2.54.2+22.04ubuntu2
- 2.54.2+22.04ubuntu3
- 2.54.3+git19.g868fc21+22.04
- 2.54.3+git26.g360067e+22.04
- 2.55.2+22.04
- 2.55.2+22.04.1
- 2.55.3+22.04
- 2.55.3+22.04ubuntu1
- 2.55.5+22.04
- 2.56.2+22.04ubuntu1
- 2.57.4+22.04
- 2.57.5+22.04
- 2.57.5+22.04ubuntu0.1
- 2.58+22.04
- 2.58+22.04.1
- 2.61.3+22.04
- 2.62+22.04
- 2.63+22.04
- 2.63+22.04ubuntu0.1
- 2.65.3+22.04
- 2.66.1+22.04
- 2.67.1+22.04
- 2.68.5+ubuntu22.04.1
- 2.71+ubuntu22.04
- 2.72+ubuntu22.04
- 2.73+ubuntu22.04
- 2.73+ubuntu22.04.1
- 2.74.1+ubuntu22.04.4
- 2.75.2+ubuntu22.04
- 2.76+ubuntu22.04
- 2.76+ubuntu22.04.1
- 2.76.3+ubuntu22.04
- 2.76.3+ubuntu22.04.1
- 2.77.1+ubuntu22.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Ubuntu:Pro:22.04:LTS
- Versions
- 1:0.0~git20201221.eec23a3-1
- 1:0.0~git20211202.5770296-1
- 1:0.0~git20211202.5770296-1ubuntu0.1~esm1
- 1:0.0~git20211202.5770296-1ubuntu0.1~esm2
- 1:0.0~git20211202.5770296-1ubuntu0.1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:24.04:LTS
- Versions
- 20230426.00-0ubuntu3
- 20231004.02-0ubuntu1
- 20231004.02-0ubuntu3
- 20240213.00-0ubuntu1
- 20240213.00-0ubuntu2
- 20240213.00-0ubuntu3
- 20240213.00-0ubuntu3.1
- 20240213.00-0ubuntu3.2
- 20240716.00-0ubuntu1~24.04.0
- 20240716.00-0ubuntu1~24.04.1
- 20241011.01-0ubuntu1~24.04.0
- 20250116.00-0ubuntu1~24.04.0
- 20250116.00-0ubuntu1~24.04.1
- 20250116.00-0ubuntu1~24.04.2
- 20250116.00-0ubuntu1~24.04.3
- 20250116.00-0ubuntu1~24.04.4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:24.04:LTS
- Versions
- 2.60.4+23.10
- 2.61.3+24.04
- 2.62+24.04build1
- 2.63+24.04
- 2.63+24.04ubuntu0.1
- 2.63.1+24.04
- 2.65.3+24.04
- 2.66.1+24.04
- 2.67.1+24.04
- 2.68.5+ubuntu24.04.1
- 2.71+ubuntu24.04
- 2.72+ubuntu24.04
- 2.73+ubuntu24.04
- 2.73+ubuntu24.04.1
- 2.73+ubuntu24.04.2
- 2.74.1+ubuntu24.04.4
- 2.75.2+ubuntu24.04
- 2.76+ubuntu24.04
- 2.76+ubuntu24.04.1
- 2.76.3+ubuntu24.04
- 2.77.1+ubuntu24.04
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Ubuntu:Pro:24.04:LTS
- Versions
- 1:0.4.0-1
- 1:0.17.0-1
- 1:0.18.0-1
- 1:0.19.0-1
- 1:0.19.0-1ubuntu0.1~esm1
- 1:0.19.0-1ubuntu0.1~esm2
- 1:0.19.0-1ubuntu0.1~esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-go.crypto Ubuntu:26.10
- Versions
- 1:0.47.0-1
- 1:0.55.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
google-guest-agent Ubuntu:26.10
- Versions
- 20250506.01-0ubuntu2
- 20250506.01-0ubuntu3
- 20260819.00+~20260819.00-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snapd Ubuntu:26.10
- Versions
- 2.74.1+ubuntu26.04.4
- 2.76+ubuntu26.10.1
- 2.76+ubuntu26.10.2
- 2.76.3+ubuntu26.10
- 2.77.1+ubuntu26.10.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published