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CVE-2026-54900
6.3 MEDIUM
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CVSS version (CVSS): 4.0
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Attack Vector (AV): Network (N)
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Attack Complexity (AC): Low (L)
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Attack Requirement (AT): Present (P)
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Privileges Required (PR): None (N)
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User Interaction (UI): None (N)
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Vulnerable System Impact Confidentiality (VC): None (N)
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Vulnerable System Impact Integrity (VI): None (N)
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Vulnerable System Impact Availability (VA): Low (L)
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Subsequent System Impact Confidentiality (SC): None (N)
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Subsequent System Impact Integrity (SI): None (N)
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Subsequent System Impact Availability (SA): None (N)
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Modified Attack Vector (MAV): Network (N)
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Modified Attack Complexity (MAC): Low (L)
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Modified Attack Requirement (MAT): Present (P)
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Modified Privileges Required (MPR): None (N)
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Modified User Interaction (MUI): None (N)
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Modified Vulnerable System Impact Confidentiality (MVC): None (N)
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Modified Vulnerable System Impact Integrity (MVI): None (N)
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Modified Vulnerable System Impact Availability (MVA): Low (L)
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Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
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Modified Subsequent System Impact Integrity (MSI): Negligible (N)
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Modified Subsequent System Impact Availability (MSA): Negligible (N)
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Safety (S): Not Defined (X)
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Automatable (AU): Not Defined (X)
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Recovery (R): Not Defined (X)
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Value Density (V): Not Defined (X)
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Vulnerability Response Effort (RE): Not Defined (X)
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Provider Urgency (U): Not Defined (X)
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Confidentiality Req. (CR): Not Defined (X)
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Integrity Req. (IR): Not Defined (X)
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Availability Req. (AR): Not Defined (X)
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Exploit Maturity (E): Not Defined (X)
created
3 weeks ago
Activity log
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Created & dismissed (max. allowed matches exceeded) suggestion
3 weeks ago
Oj: Negative-Size memcpy in Oj::Parser create_id Attribute Handling
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, when in usual mode with create_id enabled, Oj::Parser#parse is vulnerable to heap corruption via a negative-size memcpy. When a JSON object key is exactly 65,535 bytes long, an integer truncation in form_attr (usual.c:63) converts the length to -1 before passing it to memcpy. This causes memcpy to copy SIZE_MAX bytes (interpreted as a huge size_t), corrupting heap memory and crashing the process. The issue has been fixed in version 3.17.2.