How severe is GHSA-q3w9-g74q-vp5f?

No CVSS score has been assigned to GHSA-q3w9-g74q-vp5f yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-q3w9-g74q-vp5f?

GHSA-q3w9-g74q-vp5f affects the following packages: express-fileupload (npm), express-fileupload (npm), express-fileupload (npm), express-fileupload (npm), express-fileupload (npm). Ecosystems affected: npm.

How do I fix GHSA-q3w9-g74q-vp5f?

Update express-fileupload to 1.1.6-alpha.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q3w9-g74q-vp5f is resolved across your whole dependency graph.

How do I detect GHSA-q3w9-g74q-vp5f in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for express-fileupload. 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.

How do I mitigate GHSA-q3w9-g74q-vp5f 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-q3w9-g74q-vp5f?

O3 pinpoints whether GHSA-q3w9-g74q-vp5f is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-q3w9-g74q-vp5f actively exploited in the wild?

No public exploit code has been indexed for GHSA-q3w9-g74q-vp5f 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.

When was GHSA-q3w9-g74q-vp5f published, and has it been updated?

GHSA-q3w9-g74q-vp5f was published on September 3, 2020 and was last updated on August 31, 2020. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-q3w9-g74q-vp5f

GHSA-q3w9-g74q-vp5f is a security vulnerability in express-fileupload. O3 Security confirms whether GHSA-q3w9-g74q-vp5f is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Denial of Service in express-fileupload

Published

Sep 3, 2020

Updated

Aug 31, 2020

Affected

5 pkgs

Patched

5 / 5

Exploits

None indexed

Exploitation data as of Aug 31, 2020 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

5 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

944other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

express-fileuploadnpm

523Kdownloads / week

Description

Versions of express-fileupload prior to 1.1.6-alpha.6 are vulnerable to Denial of Service. The package causes server responses to be delayed (up to 30s in internal testing) if the request contains a large filename of . characters.

Recommendation

Upgrade to version 1.1.6-alpha.6 or later.

Affected Packages

5 total 5 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`express-fileupload`	all versions	1.1.6-alpha.6
📦npm	`express-fileupload`	all versions	1.1.6-alpha.6
📦npm	`express-fileupload`	all versions	1.1.6-alpha.6
📦npm	`express-fileupload`	all versions	1.1.6-alpha.6
📦npm	`express-fileupload`	all versions	1.1.6-alpha.6

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for express-fileupload. 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 express-fileupload to 1.1.6-alpha.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q3w9-g74q-vp5f 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-q3w9-g74q-vp5f 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-q3w9-g74q-vp5f. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Versions of `express-fileupload` prior to 1.1.6-alpha.6 are vulnerable to Denial of Service. The package causes server responses to be delayed (up to 30s in internal testing) if the request contains a large `filename` of `.` characters. ## Recommendation Upgrade to version 1.1.6-alpha.6 or later.

O3 Security · Impact-Aware SCA

Is GHSA-q3w9-g74q-vp5f in your dependencies?

O3 detects GHSA-q3w9-g74q-vp5f across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works