Vulnerability Description
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/thumbor/thumbor/commit/2c716119de986cfc68c7071af52a98187e0060
- https://github.com/thumbor/thumbor/releases/tag/7.8.0
- https://github.com/thumbor/thumbor/security/advisories/GHSA-phj3-59pf-cp83
FAQ
What is CVE-2026-53505?
CVE-2026-53505 is a vulnerability with a CVSS score of 7.5 (HIGH). Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform p...
How severe is CVE-2026-53505?
CVE-2026-53505 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53505?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.