Vulnerability Description
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830ae
- https://github.com/thumbor/thumbor/releases/tag/7.8.0
- https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537
- https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537
FAQ
What is CVE-2026-53500?
CVE-2026-53500 is a vulnerability with a CVSS score of 8.2 (HIGH). Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at d...
How severe is CVE-2026-53500?
CVE-2026-53500 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53500?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.