CVE-2026-54047

CRITICALPre-NVD 9.29.2
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (23rd 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-2026-76152 (ENISA EUVD)Source: ENISA EUVD

9.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Laci Synchroni is a decentralized mod and appearance sync server and plugin for Dalamud. Versions of the backend prior to 1.2.3 have an improper authentication vulnerability in the application's OAuth2 login flow. The application relies on client-side state by trusting the UID field inside the Authentications object of a user's local config.json file. By manually editing this local file on their PC prior to logging in, a user can supply an arbitrary UID. Because the server fails to validate that the authenticated OAuth2 identity matches the requested UID, an attacker can fully impersonate any target user and perform actions on their behalf. This issue has been resolved in version 1.2.3. The patch modifies AuthorizeOauthAsync inside the SecretKeyAuthenticatorService to strictly bind the lookup of the requested User ID (requestedUid) to the record of the successfully authenticated identity (primaryUid). The server will no longer load or return session tokens for a requested UID unless it matches the verified, authenticated database record. No known workarounds are available.

CVSS
9.2
EG Score
9.2CRITICALmedium confidence
EG Risk
42
EG Risk 42/100

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)
Severity92% × 45%
Impact severity (EG Severity): CVSS 9.2 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
23rd
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 (9.2): severity, escalated by confirmed exploitation. This CVE's 9.2 is its impact severity (EG Severity), not escalated.

EG Severity
9.2 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 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 low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

September 11, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Account Takeover / User Impersonation via Client-Side Configuration Manipulation · Advisory · LaciSynchroni/server · GitHub

https://github.com/LaciSynchroni/server/security/advisories/GHSA-gq4p-pxvg-6x9j
GitHub release Patch Available

v1.2.3

Patch available: LaciSynchroni/server v1.2.3

https://github.com/LaciSynchroni/server/releases/tag/v1.2.3
GitHub pull request Patch Available

fix: thing

Patch available: LaciSynchroni/server v1.2.3 (PR #28 merged 2026-06-01)

https://github.com/LaciSynchroni/server/pull/28
GitHub commit Patch Available

commit 5bc3efd68b73 (LaciSynchroni/server)

Patch available: LaciSynchroni/server v1.2.3 (contains commit 5bc3efd68b73)

https://github.com/LaciSynchroni/server/commit/5bc3efd68b738328b8faeff089dd18a826ec9ca4

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 125 rows 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. None are among the latest 100 rows. The 25 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 20:25 UTCEchelonGraph re-scored
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-11-11 18:05 UTCEchelonGraph re-scored
  4. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  6. 2026-11-10 15:43 UTCEchelonGraph re-scored
  7. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  8. 2026-11-09 13:23 UTCEchelonGraph re-scored
  9. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-11-08 11:03 UTCEchelonGraph re-scored
  11. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-11-07 08:42 UTCEchelonGraph re-scored
  13. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-11-06 11:55 UTCOSV refresh
  15. 2026-11-06 06:22 UTCEchelonGraph re-scored
  16. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-11-05 04:02 UTCEchelonGraph re-scored
  18. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-11-04 01:42 UTCEchelonGraph re-scored
  20. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-11-02 23:22 UTCEchelonGraph re-scored
  22. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-11-01 21:02 UTCEchelonGraph re-scored
  24. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  25. 2026-10-31 18:42 UTCEchelonGraph re-scored
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  1. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  2. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-10-30 16:21 UTCEchelonGraph re-scored
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-10-29 14:02 UTCEchelonGraph re-scored
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  7. 2026-10-28 11:42 UTCEchelonGraph re-scored
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-27 09:06 UTCEchelonGraph re-scored
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-26 05:44 UTCEchelonGraph re-scored
  12. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-25 14:20 UTCEchelonGraph re-scored
  14. 2026-10-25 03:23 UTCEchelonGraph re-scored
  15. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  16. 2026-10-24 01:02 UTCEchelonGraph re-scored
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-10-22 22:41 UTCEchelonGraph re-scored
  19. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-10-21 20:21 UTCEchelonGraph re-scored
  21. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-10-20 18:01 UTCEchelonGraph re-scored
  23. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-10-19 15:41 UTCEchelonGraph re-scored
  26. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  27. 2026-10-18 03:31 UTCEchelonGraph re-scored
  28. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-10-17 10:59 UTCEchelonGraph re-scored
  30. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  31. 2026-10-16 08:39 UTCEchelonGraph re-scored
  32. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  33. 2026-10-15 06:18 UTCEchelonGraph re-scored
  34. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  35. 2026-10-14 01:59 UTCEchelonGraph re-scored
  36. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  37. 2026-10-12 22:16 UTCEchelonGraph re-scored
  38. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-10-12 15:57 UTCEchelonGraph re-scored
  40. 2026-10-11 19:40 UTCEchelonGraph re-scored
  41. 2026-10-11 16:55 UTCEchelonGraph re-scored
  42. 2026-10-11 14:18 UTCEchelonGraph re-scored
  43. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-10-11 11:44 UTCEchelonGraph re-scored
  45. 2026-10-10 23:12 UTCEchelonGraph re-scored
  46. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  47. 2026-10-09 23:15 UTCEchelonGraph re-scored
  48. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  49. 2026-10-08 23:32 UTCEchelonGraph re-scored
  50. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  51. 2026-10-08 03:19 UTCEchelonGraph re-scored
  52. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  53. 2026-10-06 18:39 UTCEchelonGraph re-scored
  54. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  55. 2026-10-05 20:08 UTCEchelonGraph re-scored
  56. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  57. 2026-10-03 18:56 UTCEchelonGraph re-scored
  58. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  59. 2026-10-02 20:52 UTCEchelonGraph re-scored
  60. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  61. 2026-10-02 00:22 UTCEchelonGraph re-scored
  62. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  63. 2026-09-30 17:42 UTCEchelonGraph re-scored
  64. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  65. 2026-09-30 01:49 UTCEchelonGraph re-scored
  66. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  67. 2026-09-29 00:04 UTCEchelonGraph re-scored
  68. 2026-09-28 16:22 UTCEchelonGraph re-scored
  69. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  70. 2026-09-27 14:05 UTCEchelonGraph re-scored
  71. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  72. 2026-09-26 18:43 UTCEchelonGraph re-scored
  73. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  74. 2026-09-26 01:23 UTCEchelonGraph re-scored
  75. 2026-09-24 14:25 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-54047?
CVE-2026-54047 is a critical-severity vulnerability; its CVE record was published on September 11, 2026. Laci Synchroni is a decentralized mod and appearance sync server and plugin for Dalamud. Versions of the backend prior to 1.2.3 have an improper authentication vulnerability in the application's OAuth2 login flow. The application relies on client-side state by trusting the UID field inside the…
When was the CVE record for CVE-2026-54047 published?
The CVE record for CVE-2026-54047 was published on September 11, 2026. 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 September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-54047 actively exploited?
CVE-2026-54047 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54047?
CVE-2026-54047 has a CVSS base score of 9.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54047?
A fix for CVE-2026-54047 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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