AIKIDO-2026-10933
jsonschema is vulnerable to Denial of Service (DoS)
59
Medium Risk
This Affects:
jsonschemaTL;DR
The jsonschema crate evaluates pattern and patternProperties via underlying regex and fancy-regex engines during instance validation. Certain schemas with very large bounded quantifiers (for example ^.{0,404600}$) can trigger an internal regex-engine panic when matching specific instances, aborting the host process instead of returning a validation error. Services that validate untrusted JSON Schemas or instances against attacker-influenced patterns are at risk of denial of service. Versions before 0.46.4 call catch_unwind around regex matching and map panics to RegexEngineFailure so validation fails safely.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
jsonschema is vulnerable to Denial of Service (DoS) in versions 0.0.1 - 0.46.3.
How to fix this
Upgrade the jsonschema library to the patch version.
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