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CVE-2024-53848— check-jsonschema default caching for remote schemas allows for cache confusion

Quick assessment

Affected
python-jsonschema check-jsonschema
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

check-jsonschema是Python + JSON Schema开源的一个用于 jsonschema 验证的 CLI。 check-jsonschema存在安全漏洞，该漏洞源于默认缓存策略使用远程架构的基本名称作为缓存中文件的名称，例如https://example.org/schema.json将存储为schema.json。

CVSS 7.1 · High EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1408.002
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I. Basic Information for CVE-2024-53848

Vulnerability Information
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Vulnerability Title
check-jsonschema default caching for remote schemas allows for cache confusion
Source: CVE Program / CVE List V5
Vulnerability Description
check-jsonschema is a CLI and set of pre-commit hooks for jsonschema validation. The default cache strategy uses the basename of a remote schema as the name of the file in the cache, e.g. `https://example.org/schema.json` will be stored as `schema.json`. This naming allows for conflicts. If an attacker can get a user to run `check-jsonschema` against a malicious schema URL, e.g., `https://example.evil.org/schema.json`, they can insert their own schema into the cache and it will be picked up and used instead of the appropriate schema. Such a cache confusion attack could be used to allow data to pass validation which should have been rejected. This issue has been patched in version 0.30.0. All users are advised to upgrade. A few workarounds exist: 1. Users can use `--no-cache` to disable caching. 2. Users can use `--cache-filename` to select filenames for use in the cache, or to ensure that other usages do not overwrite the cached schema. (Note: this flag is being deprecated as part of the remediation effort.) 3. Users can explicitly download the schema before use as a local file, as in `curl -LOs https://example.org/schema.json; check-jsonschema --schemafile ./schema.json`
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在可信数据中接受外来的不可信数据
Source: CVE Program / CVE List V5
Vulnerability Title
check-jsonschema 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
check-jsonschema是Python + JSON Schema开源的一个用于 jsonschema 验证的 CLI。 check-jsonschema存在安全漏洞，该漏洞源于默认缓存策略使用远程架构的基本名称作为缓存中文件的名称，例如https://example.org/schema.json将存储为schema.json。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
python-jsonschema check-jsonschema < 0.30.0 -

II. Public POCs for CVE-2024-53848

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Qwen3.6-35B-A3B · 9959 chars
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III. Intelligence Information for CVE-2024-53848

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Patches & Fixes for CVE-2024-53848 (1)

IV. Related Vulnerabilities

Same weakness: CWE-349

V. Comments for CVE-2024-53848

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