Vulnerabilities CVE-2026-53505

CVE-2026-53505

High

Open

TLP:CLEAR

Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS

NVD CVE.org

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Description

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.

Details

CVSS Score: 7.5
EPSS Score ⓘ: 0.34%

26.7th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: Jul 31, 2026
Last Modified: Aug 3, 2026

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