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Vulnerabilities

Vulnerability · CVE-2021-29622

Open Redirect under the /new endpoint

Published May 18, 2021 · catalog updated Jun 17, 2026 · Open Redirect under the

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2021-29622 is not in CISA KEV. FIRST estimates a 19.56% chance of exploitation in the next 30 days. Check whether you run Open Redirect under the.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Open Redirect under the).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
19.56%
Remediation
Version ranges on file
Affected products
cpe prometheus/prometheus

### Impact In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address (e.g.: ), they can be redirected to an arbitrary URL. e.g. if a user visits http://127.0.0.1:9090/new/newhttp://www.google.com/, they will be redirected to http://google.com. ### Patches The issue will be patched in 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. ### Workarounds The workaround is to disable access to /new via a reverse proxy in front of Prometheus. Note: Users who use a flag _with a path_ (e.g. ) are not affected. ### For more information If you have any questions or comments about this advisory, please use our community channels (https://prometheus.io/community). Our security policy is available at https://prometheus.io/docs/operating/security/

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe prometheus/prometheus2.27.0
  • cpe prometheus/prometheus< 2.26.1

How to fix CVE-2021-29622

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-29622 is not in CISA KEV. FIRST estimates a 19.56% chance of exploitation in the next 30 days. Check whether you run Open Redirect under the.

Which versions are affected?

Compare what you have installed with 2.27.0, < 2.26.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-601: URL Redirection to Untrusted Site (Open Redirect). EPSS 19.56%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Prometheus security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 19, 2021 · Monitored products — high

    Detected

    CVE-2021-29622 is listed by Prometheus is an open-source monitoring system and time series database..

  2. Jun 17, 2026 · Monitored products — high

    Updated

    CVE-2021-29622 is listed by Prometheus is an open-source monitoring system and time series database..

Sources

  • CVE.orgVulnerability recordCVE-2021-29622

    Official CVE identifier

    cve.org
  • Maintainer security tabsVendor advisoryGHSA-vx57-7f4q-fpc7

    ### Impact In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address (e.g.: ), they can be redirected to an arbitrary URL.

    github.com
  • Monitored products — highVendor advisoryCVE-2021-29622

    Prometheus is an open-source monitoring system and time series database. In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 6, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026