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Vulnerabilities

Vulnerability · CVE-2026-25500

Rack is a modular Ruby web server interface.

Published Feb 18, 2026 · catalog updated Feb 18, 2026 · Rack is a modular

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-25500. EPSS is 0.27%. Act only if a listed version of Rack is a modular is installed.

Gaps on this record

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

Same product and reporting

Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Version ranges on file
Affected products
vendor rack rack 3.0.0.beta1, < 3.1.20

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the scheme (e.g. ), the generated index contains an anchor whose is exactly . Clicking the entry executes JavaScript in the browser (demonstrated with ). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

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.

  • vendor rack rack 3.0.0.beta1, < 3.1.203.0.0.beta1, < 3.1.20

How to fix CVE-2026-25500

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-2026-25500. EPSS is 0.27%. Act only if a listed version of Rack is a modular is installed.

Which versions are affected?

Compare what you have installed with rack rack 3.0.0.beta1, < 3.1.20 3.0.0.beta1, < 3.1.20. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

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

Timeline

Detection, updates, and resolution for this record.

  1. Feb 18, 2026 · EUVD

    Detected

    Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the scheme (e.g. ), the generated index contains an anchor whose is exactly . Clicking the entry executes JavaScript in the browser (demonstrated with ). Versions 2.2.22

  2. Feb 18, 2026 · EUVD

    Updated

    Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the scheme (e.g. ), the generated index contains an anchor whose is exactly . Clicking the entry executes JavaScript in the browser (demonstrated with ). Versions 2.2.22

Sources

  • CVE.orgVulnerability recordCVE-2026-25500

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-25500

    30-day exploitation probability 0.27%

    first.org
  • EUVDVulnerability recordEUVD-2026-7916

    Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the scheme (e.g. ), the generated index contains

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 9, 2026
  • CVE.orgNov 9, 2026
  • EUVDNov 9, 2026