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Vulnerability details: VCID-4eas-fpqk-7ugd
Vulnerability ID VCID-4eas-fpqk-7ugd
Aliases CVE-2012-5370
GHSA-fmmq-j7pq-f85c
OSV-87864
Summary JRuby denial of service via Hash Collision JRuby computes hash values without properly 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, as demonstrated by a universal multicollision attack against the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4838.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-400 Uncontrolled Resource Consumption
CWE-310 Cryptographic Issues
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual MODERATE http://jruby.org/2012/12/03/jruby-1-7-1
generic_textual MODERATE http://rhn.redhat.com/errata/RHSA-2013-0533.html
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2012-5370
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=880671
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-fmmq-j7pq-f85c
generic_textual MODERATE https://github.com/jruby/jruby/commit/5e4aab28b26fd127112b76fabfac9a33b64caf77
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2012-5370
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2012-5370
Reference id Reference type URL
http://2012.appsec-forum.ch/conferences/#c17
http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
http://jruby.org/2012/12/03/jruby-1-7-1
http://rhn.redhat.com/errata/RHSA-2013-0533.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2012-5370.json
https://api.first.org/data/v1/epss?cve=CVE-2012-5370
https://bugzilla.redhat.com/show_bug.cgi?id=880671
https://github.com/jruby/jruby/commit/5e4aab28b26fd127112b76fabfac9a33b64caf77
https://nvd.nist.gov/vuln/detail/CVE-2012-5370
https://www.131002.net/data/talks/appsec12_slides.pdf
http://www.ocert.org/advisories/ocert-2012-001.html
694694 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=694694
cpe:2.3:a:jruby:jruby:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:jruby:jruby:-:*:*:*:*:*:*:*
GHSA-fmmq-j7pq-f85c https://github.com/advisories/GHSA-fmmq-j7pq-f85c
RHSA-2012:1604 https://access.redhat.com/errata/RHSA-2012:1604
No exploits are available.
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2012-5370
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Exploit Prediction Scoring System (EPSS)
Percentile 0.6952
EPSS Score 0.00604
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:11:52.786067+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-fmmq-j7pq-f85c/GHSA-fmmq-j7pq-f85c.json 38.0.0