MediumVulnerabilityLLM-specific

CVE-2026-24055: Langfuse unauthenticated Slack installation binding to any project

Source: NVD(opens in a new tab)
Identifier: CVE-2026-24055
Published: January 21, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.4%

Summary

CVE-2026-24055 affects Langfuse versions 3.146.0 and below. The /api/public/slack/install endpoint starts Slack OAuth with a client-supplied projectId and no authentication or authorization, and the callback stores installations based on that untrusted value. An attacker can bind their Slack workspace to any project and potentially receive changes to prompts in Prompt Management, replacing existing Prompt Slack Automation integrations or pre-registering a malicious one that requires an authenticated user to configure it unknowingly.

Mitigation

Fixed in 3.147.0.

Details

Scores and exploitation

EPSS: 0.4%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-284

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Plugin
Impact: Integrity,
Confidentiality
Labels: security,
industry

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-24055

First tracked: February 15, 2026 at 08:53 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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