CVE detail
CVE-2026-33691
The OWASP core rule set (CRS) is a set of generic attack detection rules for use with compatible web application firewalls. Prior to versions 3.3.9 and 4.25.0, a bypass was identified in OWASP CRS that allows uploading files with dangerous extensions (.php, .phar, .jsp, .jspx) by inserting whitespace padding in the filename (e.g. photo. php or shell.jsp ). The affected rules do not normalize whitespace before evaluating the file extension regex, so the dot-extension check fails to match. This issue has been patched in versions 3.3.9 and 4.25.0.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 24.9 · diversity 13.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
11 source links · newest first
- http://www.openwall.com/lists/oss-security/2026/04/18/4www.openwall.com
No excerpt available.
Exploitwww.openwall.comApr 2, 2026, 4:16 PM - http://www.openwall.com/lists/oss-security/2026/03/29/2www.openwall.com
No excerpt available.
Exploitwww.openwall.comApr 2, 2026, 4:16 PM - http://seclists.org/fulldisclosure/2026/Apr/0seclists.org
No excerpt available.
Exploitseclists.orgApr 2, 2026, 4:16 PM No excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PMNo excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PMNo excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PMNo excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PMNo excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PMNo excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PM- https://github.com/coreruleset/coreruleset/commit/2a8c63512811c5dd74472becebb79a783e68ff02github.com
No excerpt available.
Exploitgithub.comApr 2, 2026, 4:16 PM Posted by relunsec | 3 points | 0 comments
communitynews.ycombinator.comMar 29, 2026, 5:08 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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