Vulnerability DatabaseCVE-2026-53500
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CVE-2026-53500
Published:July 31, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/thumbor/thumbor.git (GITHUB):
Affected version(s) >=0.1.1 <7.8.0
Fix Suggestion:
Update to version 7.8.0
thumbor (PYTHON):
Affected version(s) >=0.1.1 <7.8.0
Fix Suggestion:
Update to version 7.8.0
Related Resources (8)
https://github.com/advisories/GHSA-6x26-6r6f-m537
https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830aed7
https://pypi.org/project/thumbor
https://github.com/thumbor/thumbor/releases/tag/7.8.0
https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537
https://nvd.nist.gov/vuln/detail/CVE-2026-53500
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53500.json
https://github.com/thumbor/thumbor
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
CWE-918
Inefficient Regular Expression Complexity
CWE-1333
EPSS
Base Score:
0.29