CVE-2026-53504

High

Open

TLP:CLEAR

Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter

NVD CVE.org

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Description

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.

Details

CVSS Score: 7.5
EPSS Score ⓘ: 0.34%

26.3th 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: Jul 31, 2026

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