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Vulnerability record · CVE-2026-53505 · published 31 July 2026

CVE-2026-53505: Uncontrolled resource consumption vulnerability

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.

7.5 CVSS 3.1 High EPSS 0.61% · top 53.0% CWE-400 · Uncontrolled resource consumption Deferred
7.5CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

Description

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.

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

References

LinkTags
https://github.com/thumbor/thumbor/commit/2c716119de986cfc68c7071af52a98187e006023
https://github.com/thumbor/thumbor/releases/tag/7.8.0
https://github.com/thumbor/thumbor/security/advisories/GHSA-phj3-59pf-cp83

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Source: NIST National Vulnerability Database (record CVE-2026-53505), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.