How severe is CVE-2008-4310?

No CVSS score has been assigned to CVE-2008-4310 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2008-4310?

CVE-2008-4310 affects the following packages: webrick (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2008-4310?

Update webrick to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2008-4310 is resolved across your whole dependency graph.

How do I detect CVE-2008-4310 in my RubyGems dependencies?

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

How do I mitigate CVE-2008-4310 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 CVE-2008-4310?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2008-4310 can be triaged on real exposure rather than presence alone.

Is CVE-2008-4310 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2008-4310, including 1 documented proof-of-concept exploit on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2008-4310?

CVE-2008-4310 has an EPSS (Exploit Prediction Scoring System) score of 13.6%, placing it in the 96th 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 warrants monitoring and prompt remediation.

What type of vulnerability is CVE-2008-4310?

CVE-2008-4310 is classified as CWE-399 (CWE-399). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2008-4310 published, and has it been updated?

CVE-2008-4310 was published on May 2, 2022 and was last updated on February 9, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎 RubyGems

Not in CISA KEV

CVE-2008-4310 — webrick

Fix: ruby/webrick@b2ccd5f

CVE-2008-4310 is a CWE-399 vulnerability in webrick. 1 public exploit reference exists, so weaponization risk is real. A fix is available for webrick — see the affected versions and patch details below.

WEBrick Denial of Service Vulnerability

Published

May 2, 2022

Updated

Feb 9, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Sep 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

13.6%probability of exploitation in next 30 days

Moderate Risk0.00%

Lower risk than most CVEs96th percentile — riskier than 96% 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

💎webrick

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

Description

httputils.rb in WEBrick in Ruby 1.8.1 and 1.8.5, as used in Red Hat Enterprise Linux 4 and 5, allows remote attackers to cause a denial of service (CPU consumption) via a crafted HTTP request. NOTE: this issue exists because of an incomplete fix for CVE-2008-3656.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`webrick`	all versions	1.3.1`bundle update webrick --conservative`

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-32222dosmultiple✓ Verified

Ruby 1.9 - 'WEBrick::HTTP::DefaultFileHandler' Crafted HTTP Request Denial of Service

by Keita Yamaguchi · Aug 11, 2008

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for webrick, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update webrick to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2008-4310 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 CVE-2008-4310 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2008-4310. 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

Product	Fixed in	Advisory
Red Hat Enterprise Linux 4	`ruby-0:1.8.1-7.el4_7.2`	RHSA-2008:0981

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2008-4310 in your dependencies?

O3 Security finds CVE-2008-4310 across RubyGems 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