CVE-2026-53500 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
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

History

Sat, 01 Aug 2026 00:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 31 Jul 2026 18:45:00 +0000

Type	Values Removed	Values Added
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.
Title		Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot
Weaknesses		CWE-918
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
Metrics		cvssV3_1 `{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-31T18:35:54.234Z

Updated: 2026-07-31T23:30:44.046Z

Reserved: 2026-06-09T17:05:25.059Z

Link: CVE-2026-53500

Vulnrichment

Updated: 2026-07-31T23:30:12.623Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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