Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-88369
High 7.3
In plain English
A high-severity out-of-bounds read in the jsmn package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.3%top 80.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
zserge jsmn commit 25647e6 is vulnerable to Buffer Overflow in example/jsondump.c dump().
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | jsmn | no fix listed | DEBIAN-CVE-2026-88369 |
| Debian:13 | jsmn | no fix listed | DEBIAN-CVE-2026-88369 |
| Debian:14 | jsmn | no fix listed | DEBIAN-CVE-2026-88369 |
| Ubuntu:22.04:LTS | jsmn | no fix listed | UBUNTU-CVE-2026-88369 |
| Ubuntu:24.04:LTS | jsmn | no fix listed | UBUNTU-CVE-2026-88369 |
| Ubuntu:26.04:LTS | jsmn | no fix listed | UBUNTU-CVE-2026-88369 |
| Ubuntu:26.10 | jsmn | no fix listed | UBUNTU-CVE-2026-88369 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L