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CVE-2011-4815
Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predictably, which…
High7.8EPSS 4.1%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.
Timeline
ID reserved
By mitre
- 16 days later
· 16 days later
Published
- 13 years later
· 13 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.3% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
n/a
- affected n/a
References (16)
- 47405 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 1026474 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://www.nruns.com/_downloads/advisory28122011.pdf (opens in a new tab)x_refsource_MISCx_transferred
- 47822 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- RHSA-2012:0070 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- JVN#90615481 (opens in a new tab)third-party-advisoryx_refsource_JVNx_transferred
- ruby-hash-dos(72020) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- VU#903934 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- [ruby-talk] 20111228 [ANN] ruby 1.8.7 patchlevel 357 released (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://www.ruby-lang.org/en/news/2011/12/28/denial-of-service-attack-was-found-for-rubys-hash-algorithm/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- RHSA-2012:0069 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://support.apple.com/kb/HT5281 (opens in a new tab)x_refsource_CONFIRMx_transferred
- APPLE-SA-2012-05-09-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- JVNDB-2012-000066 (opens in a new tab)third-party-advisoryx_refsource_JVNDBx_transferred
- http://www.ocert.org/advisories/ocert-2011-003.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2011-4815)Record last updated .