How severe is CVE-2026-22860?

CVE-2026-22860 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-22860 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22860?

CVE-2026-22860 affects Rack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22860?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-22860 have an EU (EUVD) identifier?

Yes. CVE-2026-22860 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7914.

When was CVE-2026-22860 published?

CVE-2026-22860 was published on 2026-02-18 and last updated on 2026-06-30.

CVE-2026-22860

CVE-2026-22860 is a high-severity vulnerability in Rack with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7914
Weakness: CWE-22
Affected product: Rack
Published: 2026-02-18
Last modified: 2026-06-30

Description

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory`’s path check used a string prefix match on the expanded path. A request like `/../root_example/` can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

Frequently asked questions

What is CVE-2026-22860?: Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory`’s path check used a string prefix match on the expanded path. A request like `/../root_example/` can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.
How severe is CVE-2026-22860?: CVE-2026-22860 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-22860 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22860?: CVE-2026-22860 affects Rack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22860?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22860 have an EU (EUVD) identifier?: Yes. CVE-2026-22860 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7914.
When was CVE-2026-22860 published?: CVE-2026-22860 was published on 2026-02-18 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*

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