CVE-2026-44660

Published: Mag 27, 2026 Last Modified: Mag 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,7
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.

401

Missing Release of Memory after Effective Lifetime

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Other
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Instability Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Reduce Performance
Applicable Platforms
Languages: Not Language-Specific, C, C++
Likelihood of Exploit: Medium
View CWE Details
https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d0…
https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d09aa40c887b460d44b9d9…
https://github.com/ultrajson/ultrajson/releases/tag/5.12.1
https://github.com/ultrajson/ultrajson/releases/tag/5.12.1
https://github.com/ultrajson/ultrajson/security/advisories/…
https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg