Description
Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dulwich | 1.2.0-1 | — |
| Debian 13 | dulwich | No fix yet | — |
| Debian 12 | dulwich | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dulwich | No fix yet | — |
| Ubuntu 26.04 LTS | dulwich | No fix yet | — |
| Ubuntu 24.04 LTS | dulwich | No fix yet | — |
| Ubuntu 22.04 LTS | dulwich | No fix yet | — |
| Ubuntu 20.04 LTS | dulwich | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | dulwich | No fix yet | — |
| Ubuntu 16.04 LTS | dulwich | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES 15 SP6 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES 15 SP5 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES 15 SP4 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES 12 | python-dulwich | 0.18.5-4.9.1 | SUSE-SU-2026:3408-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES for SAP 15 SP5 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLES for SAP 15 SP4 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLE HPC 15 SP5 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
| SLE HPC 15 SP4 | python3-dulwich | 0.20.24-150400.11.1 | SUSE-SU-2026:3459-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | python3-dulwich +1 | 0.20.18-1.amzn2023.0.3 | ALAS2023-2026-2026 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-dulwich | No fix yet | — |
Advisories 4
- WID-SEC-2026-2455 Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- SUSE-SU-2026:3459-1 Security update for python3-dulwich SUSE / openSUSE Security Updates · Aug 4, 2026
- ALAS2023-2026-2026 Important: python-dulwich security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- SUSE-SU-2026:3408-1 Security update for python-dulwich SUSE / openSUSE Security Updates · Jul 30, 2026