CVE-2026-53504

high

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.

References

https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j

https://github.com/thumbor/thumbor/releases/tag/7.8.0

https://github.com/thumbor/thumbor/commit/3f38fe1610d20168e91f76d432212de30727eb2e

Details

Source: Mitre, NVD

Published: 2026-07-31

Updated: 2026-08-01

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High