Mozilla Firefox 3.0.6 through 3.0.13, and 3.5.x, allows remote attackers to cause a denial of service (CPU consumption) via JavaScript code with a long string value for the hash property (aka location.hash), a related issue to CVE-2008-5715.
CVE-2009-2953
NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 5%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 90.6%
- KEV
- Not listed
Published
August 24, 2009
Last Modified
April 23, 2026
References (4)
- cve@mitrehttp://websecurity.com.ua/3424/
- cve@mitrehttp://www.securityfocus.com/archive/1/506006/100/0/threaded
- af854a3a-2127-422b-91ae-364da2661108http://websecurity.com.ua/3424/
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/506006/100/0/threaded
Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Exploit-DBEDB-7554✓ verifiedFirst seen Dec 23, 2008
Mozilla Firefox 3.0.5 - location.hash Remote Crash
Open source ↗
Frequently asked(4)
What is CVE-2009-2953?
CVE-2009-2953 is a none vulnerability published on August 24, 2009. Mozilla Firefox 3.0.6 through 3.0.13, and 3.5.x, allows remote attackers to cause a denial of service (CPU consumption) via JavaScript code with a long string value for the hash property (aka location.hash), a related issue to CVE-2008-5715.
When was CVE-2009-2953 disclosed?
CVE-2009-2953 was first published in the National Vulnerability Database on August 24, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-2953 actively exploited?
CVE-2009-2953 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2009-2953?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-2953, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2009-2953
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