CVE-2024-26146
No exploitation reported by the sources we read.
- Published2024-02-29
- Fixed in3.0.9.1 · 2.2.8.1 · 2.1.4.4 · 2.0.9.4
- WeaknessCWE-1333
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.
Timeline
dates in UTC- 2024-02-2900:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-26146?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-26146?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD · CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.0 | ≥ 3.0.0, < 3.0.9.1 | 3.0.9.1 | OSV |
| 2.2 | ≥ 2.2.0, < 2.2.8.1 | 2.2.8.1 | NVD · OSV |
| 2.1 | ≥ 2.1.0, < 2.1.4.4 | 2.1.4.4 | NVD · OSV |
| 2.0 | ≥ 0.4, < 2.0.9.4 | 2.0.9.4 | NVD |
| 2.0 | < 2.0.9.4 | 2.0.9.4 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.0 | ≥ 3.0.0, < 3.0.9.1 | 3.0.9.1 | CISA-ADP |
| 2.2 | ≥ 2.2.0, < 2.2.8.1 | 2.2.8.1 | CISA-ADP |
| 2.1 | ≥ 2.1.0, < 2.1.4.4 | 2.1.4.4 | CISA-ADP |
| 2.0 | < 2.0.9.4 | 2.0.9.4 | CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 10.0 | = 10.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- pcsAlmaLinux:9all versions · fixed in 0.11.7-2.el9_4and 1 other package
- pcsAlmaLinux:8all versions · fixed in 0.10.18-2.el8_10and 1 other package
Fix
- Update Rack to 3.0.9.1 · 2.2.8.1 · 2.1.4.4 · 2.0.9.4
Advisories and patches
- discuss.rubyonrails.orgVendor Advisory
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
- github.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2024-02-29
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2024-26146?
Is CVE-2024-26146 actively exploited?
What is the CVSS score for CVE-2024-26146?
Running rack? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.