CVE-2026-53504CWE-400denial-of-service

CVE-2026-53504

High · published July 31, 2026

CVSS v3.1

7.5

EPSS

Percentile

48.5

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 7.5 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00609 · 48.5th percentile
Weakness: CWE-400 · Uncontrolled Resource Consumption
Published: 2026-07-31T23:17Z

References (4)

https://github.com/thumbor/thumbor/commit/3f38fe1610d20168e91f76d432212de30727eb2e · [email protected]https://github.com/thumbor/thumbor/releases/tag/7.8.0 · [email protected]https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j · [email protected]https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

31 JUL 18:57Z
Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter
cvelistv5