Lucene search
+L

Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature

🗓️ 04 Aug 2026 11:34:46Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 5 Views

Thumbor HMAC validation can be bypassed by replace removing the signature, altering validation.

Related
Detection
Refs

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

04 Aug 2026 13:36Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.18.2
EPSS0.00208
SSVC
5