Vulnerability · Published Mar 17, 2026 · Assigned by mongodb
CVE-2026-4359Heap-buffer-over-read in _mongoc_http_send via strstr on non-null-terminated buffer
Low 2.0
In plain English
A low-severity security flaw in MongoDB C Driver from MongoDB Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.0Low
Exploit odds (30 days)0.2%top 90.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A compromised third party cloud server or man-in-the-middle attacker could send a malformed HTTP response and cause a crash in applications using the MongoDB C driver.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | mongo-c-driver | 1.30.14-r0 | ALPINE-CVE-2026-4359 |
| Debian:12 | mongo-c-driver | 1.23.1-1+deb12u3 | DEBIAN-CVE-2026-4359 |
| Debian:13 | mongo-c-driver | 1.30.4-1+deb13u2 | DEBIAN-CVE-2026-4359 |
| Debian:14 | mongo-c-driver | 2.2.3-1 | DEBIAN-CVE-2026-4359 |
| Ubuntu:25.10 | mongo-c-driver | no fix listed | UBUNTU-CVE-2026-4359 |
| Ubuntu:26.04:LTS | mongo-c-driver | no fix listed | UBUNTU-CVE-2026-4359 |
| Ubuntu:26.10 | mongo-c-driver | no fix listed | UBUNTU-CVE-2026-4359 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB Inc | MongoDB C Driver | 0 – before 2.2.3 |
Weakness: CWE-158 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L