GHSA-8h55-q5qq-p685
HIGH(ReDoS) Regular Expression Denial of Service in tf2-item-format
EPSS Exploitation Probability
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.
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
tf2-item-formatnpmDescription
Summary
Versions of tf2-item-format since at least 4.2.6 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack when parsing crafted user input.
Tested Versions
5.9.135.8.105.7.05.6.174.3.54.2.6
v5
Upgrade package to ^5.9.14
v4
No patch exists. Please consult the v4 to v5 migration guide to upgrade to v5.
If upgrading to v5 is not possible, fork the module repository and implement the fix detailed below.
Impact
This vulnerability can be exploited by an attacker to perform DoS attacks on any service that uses any tf2-item-format to parse user input.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | tf2-item-format | ≥ 4.2.6&&< 5.9.14 | 5.9.14 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tf2-item-format. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update tf2-item-format to 5.9.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8h55-q5qq-p685 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 pinpoints whether GHSA-8h55-q5qq-p685 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-8h55-q5qq-p685. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-8h55-q5qq-p685 in your dependencies?
O3 detects GHSA-8h55-q5qq-p685 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.