How severe is CVE-2024-26142?

CVE-2024-26142 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 none, integrity none, and availability high.

Is CVE-2024-26142 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-26142?

CVE-2024-26142 affects Rubyonrails Rails. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-26142?

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-2024-26142 have an EU (EUVD) identifier?

Yes. CVE-2024-26142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0663.

When was CVE-2024-26142 published?

CVE-2024-26142 was published on 2024-02-27 and last updated on 2026-06-17.

CVE-2024-26142

CVE-2024-26142 is a high-severity vulnerability in Rubyonrails Rails 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0663
Weakness: CWE-1333
Affected product: Rubyonrails Rails
Published: 2024-02-27
Last modified: 2026-06-17

Description

Rails is a web-application framework. Starting in version 7.1.0, there is a possible ReDoS vulnerability in the Accept header parsing routines of Action Dispatch. This vulnerability is patched in 7.1.3.1. Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected.

Frequently asked questions

What is CVE-2024-26142?: Rails is a web-application framework. Starting in version 7.1.0, there is a possible ReDoS vulnerability in the Accept header parsing routines of Action Dispatch. This vulnerability is patched in 7.1.3.1. Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected.
How severe is CVE-2024-26142?: CVE-2024-26142 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 none, integrity none, and availability high.
Is CVE-2024-26142 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-26142?: CVE-2024-26142 affects Rubyonrails Rails. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-26142?: 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-2024-26142 have an EU (EUVD) identifier?: Yes. CVE-2024-26142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0663.
When was CVE-2024-26142 published?: CVE-2024-26142 was published on 2024-02-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*

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