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Fencer Vulns
high 8.8

CVE-2026-96627 json

Arcane: Delegated users:update permission allows admin account takeover via password reset (no privilege-hierarchy check)

published 2026-10-16 23 d ago modified 2026-10-19 20 d ago also GHSA-pw5q-rjx4-7f7p , GO-2026-6807 , EUVD-2026-103178

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 2.6.0, UpdateUser in backend/api/handlers/users.go sets PasswordHash for any target without comparing caller and target privilege. A holder of delegated users:update permission can submit a password change for the global administrator, replace the administrator password, and authenticate as that account, resulting in complete global administrator account takeover. This issue is fixed in version 2.6.0.

Patch / fix

  • go github.com/getarcaneapp/arcane/backend/v2 2.6.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 d ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/getarcaneapp/arcane/security/advisories/GHSA-pw5q-rjx4-7f7p referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/getarcaneapp/arcane/backend/v2
<2.6.0
2.6.0
go github.com/getarcaneapp/arcane/backend
all versions
 no fix listed

Affected products

  • getarcaneapp arcane

Classification

Weakness
  • CWE-266 Incorrect Privilege Assignment
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.