CVE-2009-1904

5.0 MEDIUM 13% exploit odds Fix listed Denial of service Library

What it is

The BigDecimal library in Ruby 1.8.6 before p369 and 1.8.7 before p173 allows context-dependent attackers to cause a denial of service (application crash) via a string argument that represents a large number, as demonstrated by an attempted conversion to the Float data type.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 12.8% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2009-06-11 21:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:08 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 12.8% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-06-11 21:30 UTC
Last modified: 2026-06-16 23:08 UTC
Exploit probability: 12.8% · EPSS, next 30 days
Weakness: CWE-189
Record status: Modified

Affected

ruby-lang Ruby 1.8.6
ruby-lang Ruby 1.8.7

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-1904.md and follow it. Check whether this project is affected by CVE-2009-1904. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record