VulnSocial

CVE-2026-25500Disclosure(rack / rack)

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch rack rack systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` 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 `javascript:` scheme (e.g. `javascript:alert(1)`), the generated index contains an anchor whose `href` is exactly `javascript:alert(1)`. Clicking the entry executes JavaScript in the browser (demonstrated with `alert(1)`). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

rack CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • rack

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 1 mentions (2026-02-18); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
rack
Products
rack

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-02-18: 1Mentions · 2026-02-23: 1Mentions · 2026-02-27: 1Patch / Workaround · 2026-02-27: 1Technical Details · 2026-02-18: 1Technical Details · 2026-02-23: 1Technical Details · 2026-02-27: 102-1802-2302-27
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-181
Disclosure1
2026-02-231
Disclosure1
2026-02-271
Patch1
Full discourse3 posts
  • ThreatCluster@threatcluster
    Patch

    Ubuntu fixes critical Rack path traversal and code execution flaws (CVE-2026-22860, CVE-2026-25500) impacting 25.10, 24.04 LTS, 22.04 LTS, 20.04 LTS. Users should update ruby-rack packages. https://threatcluster.io/cluster/critical-path-traversal-and-code-execution-vulnerabilities-i-8be99bdd

    Post summary

    Ubuntu has released updates for two critical Rack path traversal and code execution vulnerabilities (CVE-2026-22860, CVE-2026-25500) affecting multiple releases; users should update ruby-rack packages to mitigate the risks.

    0001151
    83 followersView on X
  • RUBYLAND@rubylandnews
    Disclosure

    RubySec ➜ CVE-2026-25500 (rack): Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href https://rubysec.com/advisories/CVE-2026-25500/

    Post summary

    RubySec discloses a stored XSS vulnerability in Rack::Directory where filenames are rendered into anchor hrefs, providing technical details but no PoC, exploit, or patch information.

    00010125
    2.7K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-25500 Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory index where each file entry is… https://www.cve.org/CVERecord?id=CVE-2026-25500

    Post summary

    The post announces a vulnerability in Rack's directory listing feature, noting affected versions and the resulting HTML directory index exposure.

    00000136
    56.4K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apprackrack-ruby-

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