Improper Verification of Cryptographic Signature Affecting thumbor package, versions [,7.8.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-THUMBOR-18507989
- published2 Aug 2026
- disclosed31 Jul 2026
- creditUnknown
Introduced: 31 Jul 2026
NewCVE-2026-53501 (opens in a new tab)How to fix?
Upgrade thumbor to version 7.8.0 or higher.
Overview
thumbor is a thumbor is an open-source photo thumbnail service by globo.com
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the URL signature removal process. An attacker can manipulate the validated URL and bypass intended access controls by injecting additional signature substrings into the request path, resulting in the loading of resources from unauthorized domains or paths.