CVE-2026-53504: Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter

July 31, 2026

The regular expression used to parse the convolution filter exhibits exponential-time backtracking for certain inputs, enabling a Regular Expression Denial of Service (ReDoS).

References

github.com/advisories/GHSA-5vjc-7cxw-4w6j
github.com/thumbor/thumbor/commit/3f38fe1610d20168e91f76d432212de30727eb2e
github.com/thumbor/thumbor/releases/tag/7.8.0
github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j
nvd.nist.gov/vuln/detail/CVE-2026-53504

Code Behaviors & Features

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