How severe is GHSA-fmmq-j7pq-f85c?

No CVSS score has been assigned to GHSA-fmmq-j7pq-f85c yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-fmmq-j7pq-f85c?

GHSA-fmmq-j7pq-f85c affects the following packages: org.jruby:jruby-parent (Maven). Ecosystems affected: Maven.

How do I fix GHSA-fmmq-j7pq-f85c?

Update org.jruby:jruby-parent to 1.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fmmq-j7pq-f85c is resolved across your whole dependency graph.

How do I detect GHSA-fmmq-j7pq-f85c in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jruby:jruby-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-fmmq-j7pq-f85c if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-fmmq-j7pq-f85c?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-fmmq-j7pq-f85c can be triaged on real exposure rather than presence alone.

Is GHSA-fmmq-j7pq-f85c actively exploited in the wild?

No public exploit code has been indexed for GHSA-fmmq-j7pq-f85c yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-fmmq-j7pq-f85c?

GHSA-fmmq-j7pq-f85c has an EPSS (Exploit Prediction Scoring System) score of 2.2%, placing it in the 82th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-fmmq-j7pq-f85c?

GHSA-fmmq-j7pq-f85c is classified as CWE-310 (CWE-310). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-fmmq-j7pq-f85c published, and has it been updated?

GHSA-fmmq-j7pq-f85c was published on May 17, 2022 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

GHSA-fmmq-j7pq-f85c: jruby-parent DoS

EPSS Exploitation Probability

via FIRST.org ↗

2.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs82th percentile — riskier than 82% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

☕org.jruby:jruby-parent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.jruby:jruby-parent`	all versions	1.7.1`org.jruby:jruby-parent:1.7.1`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jruby:jruby-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.jruby:jruby-parent to 1.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fmmq-j7pq-f85c is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-fmmq-j7pq-f85c can be triaged on real exposure rather than presence alone.

Tailored to GHSA-fmmq-j7pq-f85c. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

RHSA-2012:1604Fuse ESB Enterprise 7.1.0 RHSA-2013:0533Red Hat JBoss SOA Platform 5.3

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is GHSA-fmmq-j7pq-f85c in your dependencies?

O3 Security finds GHSA-fmmq-j7pq-f85c across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works

GHSA-fmmq-j7pq-f85c — jruby-parent