Description
cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| cJSON Project | cJSON | 1.7.15 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cjson | 1.7.18-3.1 | — |
| Debian 13 | cjson | 1.7.18-3.1 | — |
| Debian 12 | cjson | 1.7.15-1+deb12u3 | — |
| Debian 11 | cjson | 1.7.14-1+deb11u2 | DLA-4216-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | cjson | 1.7.18-3.1ubuntu0.1 | USN-7973-1 |
| Ubuntu 22.04 LTS | cjson | 1.7.15-1ubuntu0.1 | USN-7973-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | cjson | 1.7.17-1ubuntu0.1~esm3 | USN-7973-1 |
| Ubuntu Pro 20.04 LTS | cjson | 1.7.10-1.1ubuntu0.1~esm1 | USN-7973-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | cJSON | 1.7.19-150700.3.3.1 | SUSE-SU-2025:03520-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cJSON | 1.7.19-1.1 | openSUSE-SU-2025:15583-1 |
| openSUSE Leap 16.0 | cJSON | 1.7.19-160000.1.1 | openSUSE-SU-2026:20340-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | ceph | No fix yet | — |
| Azure Linux 3 | libglvnd | 1.7.0-3 | — |
Advisories 5
- USN-7973-1 cjson vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2026:20340-1 Security update for cJSON SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15583-1 cJSON-devel-1.7.19-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4216-1 cjson - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:03520-1 Security update for cJSON SUSE / openSUSE Security Updates · Feb 4, 2026