CVE-2026-42461Disclosure(getarcane / arcane)

LOWCVSS 7.5 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to version 1.18.0, four GET endpoints under /api/templates* in Arcane's Huma backend are registered without any Security requirement, allowing any unauthenticated network client to list and read the full Compose YAML and .env content of every custom template stored in the instance. Because Arcane's UI exposes a "Save as Template" flow on the project / swarm-stack creation pages that persists the operator's real env content (database passwords, API keys, etc.) verbatim, this missing authorization is an unauthenticated read of operator secrets in practice — not a theoretical info-disclosure. The frontend explicitly treats /customize/templates/* as an authenticated area (PROTECTED_PREFIXES in frontend/src/lib/utils/redirect.util.ts), and every CRUD operation (POST/PUT/DELETE) on the same paths requires a Bearer/API key, so this is a clear backend authorization gap, not intended public access. This issue has been patched in version 1.18.0.

getarcane CVEs Back to dashboard

1.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://github.com/getarcaneapp/arcane/security/advisories/GHSA-cxx3-hr75-4q96

Other references

https://github.com/getarcaneapp/arcane/releases/tag/v1.18.0

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

arcane

Threat summary

Public PoC is present in monitored signal
4 mentions across 3 observed days
Momentum state: stable

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 3 signals
Disclosure: 3 classified signals
General: 1 classified signal
Peaked 2d ago at 2 mentions (2026-05-09); latest day: 1
4 total mentions across 3 days

Affected systems

Vendors

getarcane

Products

arcane

Deep dive

Activity timeline4 mentions / 3d

Signal classification2 categories

Disclosure

375.0%

General

125.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-05-09	2	Disclosure1General1
2026-05-11	1	Disclosure1
2026-08-11	1	Disclosure1

Full discourse4 posts

pdnuclei-bot@pdnuclei_bot59d
Disclosure
🚨 CVE-2026-42461 - high 🚨 Arcane < 1.18.0 - Unauthenticated Template and Env Disclosure > Arcane < 1.18.0 contains an information disclosure caused by missing authorization on... 👾 https://cloud.projectdiscovery.io/library/CVE-2026-42461 @pdnuclei #NucleiTemplates #cve
Post summary
The post announces CVE-2026-42461 as a high‑severity vulnerability affecting Arcane versions below 1.18.0, describing an unauthenticated information disclosure due to missing authorization. It includes a link to a detection template but no exploit code or patch information.
030102651
1.3K followersView on X
CVEarity@CVEarity151d
Disclosure
⚡ New CVE Alert: CVE-2026-42461 📊 Severity: 8.7 🚨 Risk Level: High 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-42461 #CVE-2026-42461 #CVE #High #CyberSecurity #InfoSec https://t.co/BVAH6mNJIn
Post summary
The post announces CVE‑2026‑42461 with a severity score of 8.7 and high risk, but provides no PoC, exploit, or patch details.
0000043
157 followersView on X
CVE@CVEnew152d
General
CVE-2026-42461 Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to version 1.18.0, four GET endpoints under /api/templates* in Arcane's Hu… https://www.cve.org/CVERecord?id=CVE-2026-42461
Post summary
The text references CVE-2026-42461 and notes unsecured GET endpoints in Arcane before version 1.18.0, but offers no actionable exploit, patch, or claim of active usage.
0000066
57.5K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds153d
Disclosure
CVE-2026-42461 Unauthenticated Information Disclosure of Secrets in Arcane Docker Manag... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42461 Vulnerability Notification: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=3
Post summary
The post announces CVE‑2026‑42461, an unauthenticated information disclosure vulnerability in Arcane Docker Manager, but offers no PoC, exploit details, active exploitation evidence, patch info, or technical specifics.
0000053
4.0K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	getarcane	arcane	-	-	-

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What researchers are saying

CVE-2026-42461

pdnuclei-bot@pdnuclei_botDisclosure

The post announces CVE-2026-42461 as a high‑severity vulnerability affecting Arcane versions below 1.18.0, describing an unauthenticated information disclosure due to missing authorization. It includes a link to a detection template but no exploit code or patch information.

CVEarity@CVEarityDisclosure

The post announces CVE‑2026‑42461 with a severity score of 8.7 and high risk, but provides no PoC, exploit, or patch details.

CVE@CVEnewGeneral

The text references CVE-2026-42461 and notes unsecured GET endpoints in Arcane before version 1.18.0, but offers no actionable exploit, patch, or claim of active usage.

Vulmon Vulnerability Feed@VulmonFeedsDisclosure

The post announces CVE‑2026‑42461, an unauthenticated information disclosure vulnerability in Arcane Docker Manager, but offers no PoC, exploit details, active exploitation evidence, patch info, or technical specifics.