Denial of Service Vulnerability in Thumbor by Globo.com
CVE-2026-53505

7.5HIGH

Key Information:

Vendor

Thumbor

Status
Thumbor
Vendor
CVE Published:
31 July 2026

What is CVE-2026-53505?

Thumbor, an open-source photo thumbnail service developed by Globo.com, has a flaw in its filters:proportion() filter prior to version 7.8.0. This vulnerability allows an attacker to input an unbounded , leading to excessive resource consumption and potential denial of service. It is crucial for users to upgrade to version 7.8.0 or later to mitigate this risk.

Affected Version(s)

thumbor < 7.8.0

References

https://github.com/thumbor/thumbor/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/thumbor/thumbor/commit/2c716119de986cf...
x_refsource_MISC
https://github.com/thumbor/thumbor/releases/tag/7.8.0
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.