PT-2026-36823 · Arcane · Arcane

Kmendell · Published 2026-04-30 · Updated 2026-05-11 · CVE-2026-42461

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Arcane versions prior to 1.18.0

Description Four 'GET' endpoints under "/api/templates*" in the Huma backend are registered without security requirements. This authorization gap allows any unauthenticated network client to list and read the full Compose YAML and .env content of every custom template stored in the instance. Because the user interface persists real environment content—such as database passwords and API keys—verbatim during the "Save as Template" flow, this allows for the unauthenticated read of operator secrets. The affected endpoints include "/templates", "/templates/all", "/templates/{id}", and "/templates/{id}/content".

Recommendations Update to version 1.18.0.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-42461

GHSA-CXX3-HR75-4Q96

Affected Products

Arcane

References · 9

• https://github.com/getarcaneapp/arcane/security/advisories/GHSA-cxx3-hr75-4q96 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42461 · Security Note
• https://osv.dev/vulnerability/GHSA-cxx3-hr75-4q96 · Vendor Advisory
• https://github.com/getarcaneapp/arcane · Note
• https://github.com/getarcaneapp/arcane/releases/tag/v1.18.0 · Note
• https://reddit.com/r/VulnMatter/comments/1t3jriw/resumen_diario_de_vulnerabilidades_04052026 · Reddit Post
• https://twitter.com/CVEnew/status/2053131397024612734 · Twitter Post
• https://t.me/CVEtracker/53198 · Telegram Post
• https://twitter.com/CVEarity/status/2053796849065300319 · Twitter Post