CVE-2026-53500

high

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.

References

https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537

https://github.com/thumbor/thumbor/releases/tag/7.8.0

https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830aed7

Details

Source: Mitre, NVD

Published: 2026-07-31

Updated: 2026-08-01

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:P

Severity: High

CVSS v3

Base Score: 8.2

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Severity: High