CVE-2026-53500

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.

Score

CVSS 3.1 8.2 High

Status

Deferred - security-advisories@github.com

Published

2026-07-31

Last modified

2026-07-31

Weaknesses

CWE-918

Affected products

• Thumbor (Thumbor)

References

• https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830aed7
• https://github.com/thumbor/thumbor/releases/tag/7.8.0
• https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537