CVE-2026-53504
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.
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Advisory coverage (1)
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[](https://www.csirts.com/cve/CVE-2026-53504)