CVE-2026-53504

7.5 highEPSS 0.6%

High (7.5). EPSS 0.6% chance of exploitation in the next 30 days. Fixed in thumbor 7.8.0.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-11-01)
CWE: CWE-400
Published: 2026-07-31
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-5vjc-7cxw-4w6j	PyPI	thumbor	<7.8.0	7.8.0
PYSEC-2026-3616	PyPI	thumbor	<7.8.0	7.8.0

References

https://github.com/thumbor/thumbor/commit/3f38fe1610d20168e91f76d432212de30727eb2e
https://github.com/thumbor/thumbor/releases/tag/7.8.0
https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j
https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j

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