CVE-2025-32755: In jenkins/ssh-slave Docker images based on Debian, SSH host keys are generated on image creation for images b

This month

CRITICAL 9.1REMOTEWATCHLISTMITIGATE

CVE-2025-32755 is a critical-severity flaw (CVSS 9.1) affecting ssh-slave. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In jenkins/ssh-slave Docker images based on Debian, SSH host keys are generated on image creation for images based on Debian, causing all containers based on images of the same version use the same SSH host keys, allowing attackers able to insert themselves into the network path between the SSH client (typically the Jenkins controller) and SSH build agent to impersonate the latter.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-338
Published	2025-04-10
Last modified	2026-06-17

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-10 12:15 UTCPublished CVE record published
2026-06-17 09:12 UTCUpdated Record last modified

jenkins ssh-slave MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ssh-slave || rpm -q ssh-slave || ssh-slave --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-32755?

ssh-slave: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-32755 being exploited?

CVE-2025-32755 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-32755 affect?

CVE-2025-32755 affects ssh-slave. Severity is critical (CVSS 9.1). In jenkins/ssh-slave Docker images based on Debian, SSH host keys are generated on image creation for images based on Debian, causing all containers based on images of the same version use the same SSH host keys, allowing attackers able to

How urgent is CVE-2025-32755?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Docker vulnerabilities · Jenkins vulnerabilities · Debian vulnerabilities

References

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