CVE-2025-64504

MEDIUMPre-NVD 5.05.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (27th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2025-50817 (ENISA EUVD)Source: ENISA EUVD

5.0EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Langfuse is an open source large language model engineering platform. Starting in version 2.70.0 and prior to versions 2.95.11 and 3.124.1, in certain project membership APIs, the server trusted a user‑controlled orgId and used it in authorization checks. As a result, any authenticated user on the same Langfuse instance could enumerate names and email addresses of users in another organization if they knew the target organization’s ID. Disclosure is limited to names and email addresses of members/invitees. No customer data such as traces, prompts, or evaluations is exposed or accessible. For Langfuse Cloud, the maintainers ran a thorough investigation of access logs of the last 30 days and could not find any evidence that this vulnerability was exploited. For most self-hosting deployments, the attack surface is significantly reduced given an SSO provider is configured and email/password sign-up is disabled. In these cases, only users who authenticate via the Enterprise SSO IdP (e.g. Okta) would be able to exploit this vulnerability to access the member list, i.e. internal users getting access to a list of other internal users. In order to exploit the vulnerability, the actor must have a valid Langfuse user account within the same instance, know the target orgId, and use the request made to the API that powers the frontend membership tables, including their project/user authentication token, while changing the orgId to the target organization. Langfuse Cloud (EU, US, HIPAA) were affected until fix deployment on November 1, 2025. The maintainers reviewed the Langfuse Cloud access logs from the past 30 days and found no evidence that this vulnerability was exploited. Self-Hosted versions which contain patches include v2.95.11 for major version 2 and v3.124.1 for major version 3. There are no known workarounds. Upgrading is required to fully mitigate this issue.

CVSS v3
5.0
EG Score
5.0MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity50% × 45%
Impact severity (EG Severity): CVSS 5.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
27th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.0): severity, escalated by confirmed exploitation. This CVE's 5.0 is its impact severity (EG Severity), not escalated.

EG Severity
5.0 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

November 10, 2025

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated Oct 23, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Cross‑organization enumeration of member & invitation lists via project membership APIs · Advisory · langfuse/langfuse · GitHub

https://github.com/langfuse/langfuse/security/advisories/GHSA-94hf-6gqq-pj69
GitHub release Patch Available

v3.124.1

Patch available: langfuse/langfuse v3.124.1

https://github.com/langfuse/langfuse/releases/tag/v3.124.1
GitHub release Patch Available

v2.95.11

Patch available: langfuse/langfuse v2.95.11

https://github.com/langfuse/langfuse/releases/tag/v2.95.11
GitHub release Patch Available

v2.70.0

Patch available: langfuse/langfuse v2.70.0

https://github.com/langfuse/langfuse/releases/tag/v2.70.0
GitHub commit Patch Available

commit 6c2529049a4c (langfuse/langfuse)

Patch available: langfuse/langfuse v4.44.0 (contains commit 6c2529049a4c)

https://github.com/langfuse/langfuse/commit/6c2529049a4c962928c435984c81a547a497e3e5
GitHub commit Patch Available

commit 67990ebfdcf0 (langfuse/langfuse)

Patch available: langfuse/langfuse v4.44.0 (contains commit 67990ebfdcf0)

https://github.com/langfuse/langfuse/commit/67990ebfdcf0f0c32a6710efa7ddbda073812ab4

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 38× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 95 of 193 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 98 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  3. 2026-10-31 18:25 UTCOSV refresh
  4. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  7. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  8. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  9. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  10. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  11. 2026-10-25 16:11 UTCEG score recompute
  12. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-10-23 13:33 UTCEG score recompute
  15. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  16. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  17. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  18. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-10-18 05:20 UTCEG score recompute
  21. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  22. 2026-10-16 16:39 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  23. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Show 70 more
  1. 2026-10-12 16:49 UTCEG score recompute
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-11 20:24 UTCEG score recompute
  4. 2026-10-11 18:36 UTCEG score recompute
  5. 2026-10-11 15:11 UTCEG score recompute
  6. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  8. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-02 00:41 UTCOSV refresh
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-09-19 15:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  26. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  27. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  28. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  29. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  30. 2026-09-12 18:06 UTCOSV refresh
  31. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  32. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  33. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  34. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  36. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  37. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  38. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  39. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  40. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  41. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  42. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  43. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  44. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  45. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  46. 2026-08-24 23:44 UTCOSV refresh
  47. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  48. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  49. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  52. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  53. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  54. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  55. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  56. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  57. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  58. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  59. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  60. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  62. 2026-08-08 16:55 UTCOSV refresh
  63. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  64. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  65. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  67. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  68. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  69. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  70. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile

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Frequently asked(5)

What is CVE-2025-64504?
CVE-2025-64504 is a medium-severity vulnerability; its CVE record was published on November 10, 2025. Langfuse is an open source large language model engineering platform. Starting in version 2.70.0 and prior to versions 2.95.11 and 3.124.1, in certain project membership APIs, the server trusted a user‑controlled orgId and used it in authorization checks. As a result, any authenticated user on the…
When was the CVE record for CVE-2025-64504 published?
The CVE record for CVE-2025-64504 was published on November 10, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2025-64504 actively exploited?
CVE-2025-64504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-64504?
CVE-2025-64504 has a CVSS base score of 5.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-64504?
A fix for CVE-2025-64504 is available: update to the fixed version the vendor names in its advisory.

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