CVE-2021-22101: Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerabil

Q: How do I fix CVE-2021-22101?

capi-release: upgrade to 1.118.0; cf-deployment: upgrade to 16.24.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-22101 being exploited?

CVE-2021-22101 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-22101 affect?

CVE-2021-22101 affects capi-release, cf-deployment. Severity is high (CVSS 7.5). Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerability allowing unauthenticated attackers to cause denial of service by using REST HTTP requests with label_selectors on multiple V3

Q: How urgent is CVE-2021-22101?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2021-22101 is a high-severity flaw (CVSS 7.5) affecting capi-release, cf-deployment. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerability allowing unauthenticated attackers to cause denial of service by using REST HTTP requests with label_selectors on multiple V3 endpoints by generating an enormous SQL query.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-400
Published	2021-10-27
Last modified	2026-06-17

Publisher (CNA): VMware · Vendor: cloudfoundry

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

Am I affected?

Timeline

2021-10-27 15:15 UTCPublished CVE record published
2026-06-17 03:36 UTCUpdated Record last modified

cloudfoundry capi-release UPGRADE

Affected: < 1.118.0

Fixed in: 1.118.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy capi-release || rpm -q capi-release || capi-release --version

2. UPGRADE to 1.118.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade capi-release

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade capi-release

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

cloudfoundry cf-deployment UPGRADE

Affected: < 16.24.0

Fixed in: 16.24.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cf-deployment || rpm -q cf-deployment || cf-deployment --version

2. UPGRADE to 16.24.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cf-deployment

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cf-deployment

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-22101?

capi-release: upgrade to 1.118.0; cf-deployment: upgrade to 16.24.0. Exact commands for each OS are on this page.

Is CVE-2021-22101 being exploited?

CVE-2021-22101 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-2021-22101 affect?

CVE-2021-22101 affects capi-release, cf-deployment. Severity is high (CVSS 7.5). Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerability allowing unauthenticated attackers to cause denial of service by using REST HTTP requests with label_selectors on multiple V3

How urgent is CVE-2021-22101?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

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References

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