🛡️ CVE-2026-41487 — langfuse
Description
Langfuse is an open source large language model engineering platform. From version 3.68.0 to before version 3.167.0, there is a role-based-access control flaw in the LLM connection update flow. An authenticated, low-privileged user of role “member” in a project could request the update of an existing LLM connection to an attacker-controlled baseUrl, causing Langfuse to reuse the stored provider secret and redirect the test request to an attacker-controlled endpoint. This could expose the plaintext provider LLM API key for that connection. The attack is only possible if a user is already part of a project and has “member” scoped access. This issue has been patched in version 3.167.0.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.
Weakness class
CVE-2026-41487 is classified as CWE-284: Improper Access Control. The software does not restrict an action to the actors that should be allowed to perform it.
Affected software
CVE-2026-41487 is recorded against 2 packages.
- langfuse (from 3.68.0 up to 3.167.0)
- unknown
Timeline and source
Published on 8 May 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.
References
github.com
github.com
github.com
github.com
github.com
github.com
Details
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| langfuse | 3.68.0 | 3.167.0 |
| unknown | — | — |
References
Similar Threats
- Unknown CGA-hp7c-8j96-c7mq
- Unknown CGA-28fp-q5jj-4hf3
- Unknown CGA-2rx3-jcx9-jqc3
- Unknown CGA-4wv7-2923-8hcg
- Unknown CGA-59qr-qv2h-m5vf
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
Vulnerability Monitoring
Track new vulnerabilities in langfuse
CVE-2026-41487 is rated CVSS 5.4 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.
Set Up Free Alerts →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.