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CVE-2026-54903

Oj: Integer Overflow in Oj.load 2GB String Handling

CVSS 6.3 MEDIUMEPSS 0.3%CWE-190
Vexday Risk Score
13Baixo
Decisão SSVC (CISA)
Track
Sem sinal de exploração → monitorar
CVSS 6.3EPSS 0.3%KEV nãoPoC Nuclei Metasploit Patch
Ciclo de vida
30 jun 2026Publicada no NVD
Recomendação: Monitorar — sem sinal de exploração no momento.
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Produtos afetados
ohler55 · oj

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