Axios: ReDoS in fromDataURI data: URL parser freezes the Node event loop (DoS) — GHSA-C29M-XWM3-CM6R

Summary

## Summary Axios for Node.js parses `data:` URLs in `lib/helpers/fromDataURI.js`. The current RFC-2397 parser uses a regular expression whose media type groups allow `/` inside both sides of the `type/subtype` match. A malformed `data:` URL containing many slashes and no comma forces the JavaScript regex engine to try many possible placements for the separator before failing. Applications are affected when they…

Timeline

Published by source

2026-09-30

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 8.2 out of 10.
• Reported EPSS value: 0.00382.
• Review exposure for the affected product or family: npm: axios.

Product

npm: axios

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-C29M-XWM3-CM6R

Source

GitHub

Vendor

GitHub

Published by source

2026-09-30

Last source activity

2026-09-30

Additional identifiers

CVE-2026-101903

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.