Is CVE-2026-53504 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-53504?

CVE-2026-53504 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-53504

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.