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Vulnerabilities

Security fix · CVE-2022-46146

Basic authentication bypass

Published Nov 29, 2022 · catalog updated Apr 14, 2026 · Basic authentication bypass

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

Check if you run it

No confirmed exploitation is on record for CVE-2022-46146. EPSS is 1.29%. Act only if a listed version of Basic authentication bypass is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Basic authentication bypass).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.29%
Remediation
Not established
Affected products
See sources for product scope

### Impact Prometheus can be secured by a web.yml file that specifies usernames and hashed passwords for basic authentication. Passwords are hashed with bcrypt, which means that even if you have access to the hash, it is very hard to find the original password back. However, a flaw in the way this mechanism was implemented in the [exporter toolkit](https://github.com/prometheus/exporter-toolkit) makes it possible with people who know the hashed password to authenticate against Prometheus. A request can be forged by an attacker to poison the internal cache used to cache the computation of hashes and make subsequent requests successful. This cache is used in both happy and unhappy scenarios in order to limit side channel attacks that could tell an attacker if a user is present in the file or not. ### Patches Prometheus 2.37.4 ([LTS](https://prometheus.io/docs/introduction/release-cycle/)) and 2.40.4 have been released to address this issue. ### Workarounds There is no workaround but attacker must have access to the hashed password, stored in disk, to bypass the authentication. ### Credit We want to thank Lei Wan for reporting this security issue.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2022-46146

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

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

Should you patch?

No confirmed exploitation is on record for CVE-2022-46146. EPSS is 1.29%. Act only if a listed version of Basic authentication bypass is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-303. EPSS 1.29%. 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.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 29, 2022 · Maintainer security tabs

    Detected

    ### Impact Prometheus can be secured by a web.yml file that specifies usernames and hashed passwords for basic authentication. Passwords are hashed with bcrypt, which means that even if you have access to the hash, it is very hard to find the original password back. However, a flaw in the way this mechanism was implemented in the [exporter toolkit](https://github.com/prometheus/exporter-toolkit) m

  2. Apr 14, 2026 · Maintainer security tabs

    Updated

    ### Impact Prometheus can be secured by a web.yml file that specifies usernames and hashed passwords for basic authentication. Passwords are hashed with bcrypt, which means that even if you have access to the hash, it is very hard to find the original password back. However, a flaw in the way this mechanism was implemented in the [exporter toolkit](https://github.com/prometheus/exporter-toolkit) m

Sources

  • CVE.orgVulnerability recordCVE-2022-46146

    Official CVE identifier

    cve.org
  • Maintainer security tabsVendor advisoryGHSA-4v48-4q5m-8vx4

    ### Impact Prometheus can be secured by a web.yml file that specifies usernames and hashed passwords for basic authentication. Passwords are hashed with bcrypt, which means that even if you have access to the hash, it is very hard to find the original password back. However, a flaw in the way this mechanism was implemented in the [exporter toolkit](https://github.com/prometheus/exporter-toolkit) m

    github.com

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.

  • CVE.orgNov 6, 2026
  • Maintainer security tabsNov 6, 2026