CVE Watch31 jul 2026

CVE-2026-53503

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_n

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 31 jul 2026 · Última mod.: 31 jul 2026 · CWE-20 · CWE-369

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_normalize>) filter passes the user-controlled <columns> value to a C extension (thumbor/ext/filters/_convolution.c) where it is used as a divisor (for % and /) without validating columns > 0. When columns=0, the C code triggers undefined behavior; on x86_64 this reliably results in a fatal divide-by-zero trap (SIGFPE) and crashes the Thumbor process, causing a remote denial of service. This issue is fixed in 7.8.0.

Referencias oficiales

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