CVE-2020-35850: An SSRF issue was discovered in cockpit-project.org Cockpit 234

This month

MEDIUM 6.5DOWNGRADE

CVE-2020-35850 is a medium-severity flaw (CVSS 6.5) affecting cockpit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An SSRF issue was discovered in cockpit-project.org Cockpit 234. NOTE: this is unrelated to the Agentejo Cockpit product. NOTE: the vendor states "I don't think [it] is a big real-life issue.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-918
Published	2020-12-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cockpit-project

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

Am I affected?

Timeline

2020-12-30 02:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

cockpit-project cockpit DOWNGRADE

Affected: 234

Fixed in: no fixed release known

Safe to downgrade to: a release before 234

1. Check installed version

apt-cache policy cockpit || rpm -q cockpit || cockpit --version

2. No fixed release: DOWNGRADE to a release before 234 (Debian / Ubuntu)

apt-cache madison cockpit sudo apt install cockpit=<VERSION_BEFORE_234> sudo apt-mark hold cockpit

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cockpit sudo dnf downgrade cockpit-<VERSION_BEFORE_234> sudo dnf versionlock add cockpit

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-35850?

cockpit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-35850 being exploited?

CVE-2020-35850 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-2020-35850 affect?

CVE-2020-35850 affects cockpit. Severity is medium (CVSS 6.5). An SSRF issue was discovered in cockpit-project.org Cockpit 234. NOTE: this is unrelated to the Agentejo Cockpit product. NOTE: the vendor states "I don't think [it] is a big real-life issue.

How urgent is CVE-2020-35850?

Priority 47/100. Public exploit reference

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References

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