# CVE-2023-26819: cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}.

CVE-2023-26819 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2023-26819, released April 19, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-26819
- Priority: Routine
- CVSS: 2.9 (Low)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 19, 2025
- Weakness: Expected Behavior Violation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-26819

## Description

cjson - security update

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cJSON opensuse-leap 16.0 | 1.7.19-160000.1.1 | [OPENSUSE-SU-2026:20340-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20340-1.md) | Mar 11, 2026 |
| Linux | cJSON sles 15.7 | 1.7.19-150700.3.3.1 | [SUSE-SU-2025:03520-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03520-1.md) | Oct 10, 2025 |
| Linux | cjson Debian 11.6 (bullseye) | 1.7.14-1+deb11u2 | [DLA-4216-1](https://patchblox.com/security/data/fix/linux/dla-4216-1.md) | Jun 15, 2025 |
| Linux | cjson Debian 12.15 (bookworm) | 1.7.15-1+deb12u3 | [DEBIAN-CVE-2023-26819](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26819.md) | Apr 19, 2025 |
| Linux | cjson Debian 13.5 (trixie) | 1.7.18-3.1 | [DEBIAN-CVE-2023-26819](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26819.md) | Apr 19, 2025 |
| Linux | cjson Debian 14 | 1.7.18-3.1 | [DEBIAN-CVE-2023-26819](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26819.md) | Apr 19, 2025 |
| Linux | libcjson1 Ubuntu 20.04 LTS (focal) | 1.7.10-1.1ubuntu0.1~esm1 | [libcjson1 1.7.10-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libcjson1-1.7.10-1.1ubuntu0.1-esm1.md) | Sep 3, 2025 |
| Linux | libcjson1 Ubuntu 22.04.1 LTS (jammy) | 1.7.15-1ubuntu0.1 | [libcjson1 1.7.15-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcjson1-1.7.15-1ubuntu0.1.md) | Sep 3, 2025 |
| Linux | libcjson1 Ubuntu 24.04.5 LTS (noble) | 1.7.17-1ubuntu0.1~esm3 | [libcjson1 1.7.17-1ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcjson1-1.7.17-1ubuntu0.1-esm3.md) | Sep 3, 2025 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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