CVE-2026-53500

Published: Jul 31, 2026Modified: Sep 8, 2026Deferred

8.2

Vector

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

Exploitability: 3.9 / Impact: 4.2

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-918

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

References (4)

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

Source: security-advisories@github.com

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

Source: security-advisories@github.com

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

Source: security-advisories@github.com

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.