Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot — GHSA-6X26-6R6F-M537

Summary

Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

Timeline

Published by source

2026-07-31

Risk context

• Reported severity or threat level: medium.
• Review exposure for the affected product or family: GitHub Advisory.

Product

GitHub Advisory

What to do

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

• Review exposure and plan remediation based on risk and environment.
• 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

Evidence and provenance

Canonical advisory ID

GHSA-6X26-6R6F-M537

Source

GitHub

Vendor

GitHub

Published by source

2026-07-31

Last source activity

2026-07-31

Curated by

hlukh.ch

Related advisories and connections

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