Bug 2495409 (CVE-2026-54696) - CVE-2026-54696 json: Ruby JSON: Denial of service via heap buffer overflow with oversized streamed objects
Summary: CVE-2026-54696 json: Ruby JSON: Denial of service via heap buffer overflow wi...
Keywords:
Status: NEW
Alias: CVE-2026-54696
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-30 23:01 UTC by OSIDB Bzimport
Modified: 2026-07-28 14:21 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-30 23:01:37 UTC 
Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an
attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.
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