CVE-2025-32379: Koa is expressive middleware for Node.js using ES2017 async functions

Q: How urgent is CVE-2025-32379?

Priority 22/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2025-32379 is a medium-severity flaw (CVSS 5.0) affecting koa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Koa is expressive middleware for Node.js using ES2017 async functions. In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app. This issue is patched in 2.16.1 and 3.0.0-alpha.5.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-04-09
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: koajs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-09 16:15 UTCPublished CVE record published
2026-06-17 09:11 UTCUpdated Record last modified

koajs koa UPGRADE

Affected: < 2.16.1 · 3.0.0 alpha0 · 3.0.0 alpha1 · 3.0.0 alpha2 · 3.0.0 alpha3 · 3.0.0 alpha4

Fixed in: 2.16.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls koa

2. UPGRADE to 2.16.1

npm install koa@">=2.16.1"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-32379?

koa: upgrade to 2.16.1. Exact commands for each OS are on this page.

Is CVE-2025-32379 being exploited?

CVE-2025-32379 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-32379 affect?

CVE-2025-32379 affects koa. Severity is medium (CVSS 5.0). Koa is expressive middleware for Node.js using ES2017 async functions. In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app. Th

How urgent is CVE-2025-32379?

Priority 22/100. No elevated risk signals yet.

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2025-62595 MEDIUM 4.3 UPGRADE Koa is expressive middleware for Node.js using ES2017 async functions
CVE-2026-27959 HIGH 7.5 UPGRADE Koa is middleware for Node.js using ES2017 async functions
CVE-2025-8129 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, was found in KoaJS Koa up to 3.0.0
CVE-2025-25200 HIGH 7.5 UPGRADE Koa is expressive middleware for Node.js using ES2017 async functions

References

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