CVE-2023-22795
No exploitation reported by the sources we read.
- Published2023-02-09
- Fixed in7.0.4.1 · 6.1.7.1
- WeaknessCWE-1333 · CWE-400
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
A regular expression based DoS vulnerability in Action Dispatch <6.1.7.1 and <7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.
Timeline
dates in UTC- 2023-02-0920:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-22795?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-22795?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.0 | ≥ 7.0.0, < 7.0.4.1 | 7.0.4.1 | NVD |
| 6.1 | < 6.1.7.1 | 6.1.7.1 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.0 | = 11.0 | 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.
Vendor advisories
Red Hat Security Advisory: Satellite 6.14 security and bug fix update
Fix
- Update Ruby on Rails to 7.0.4.1 · 6.1.7.1
- Vendor fix Red Hat Product Security RHSA-2023:6818 · 2 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.14/html/upgrading_red_hat_satellite_to_6.14/index
Advisories and patches
- discuss.rubyonrails.orgPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- CNAweakness (CWE)CWE-400read 2026-10-23
- NVDweakness (CWE)CWE-1333read 2026-10-23
- FIRST EPSSEPSS score2.3 %2026-10-22
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
- 2023-02-09
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2023-22795?
Is CVE-2023-22795 actively exploited?
What is the CVSS score for CVE-2023-22795?
Running Satellite 6.14? 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 ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.