CVE-2026-23520

CRITICALNVD 8.09.0▲
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.0 under NVD CVSS v3. EPSS exploit probability: 1.6%, top 26% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Arcane provides modern docker management. Prior to 1.13.0, Arcane has a command injection in the updater service. Arcane’s updater service supported lifecycle labels com.getarcaneapp.arcane.lifecycle.pre-update and com.getarcaneapp.arcane.lifecycle.post-update that allowed defining a command to run before or after a container update. The label value is passed directly to /bin/sh -c without sanitization or validation. Because any authenticated user (not limited to administrators) can create projects through the API, an attacker can create a project that specifies one of these lifecycle labels with a malicious command. When an administrator later triggers a container update (either manually or via scheduled update checks), Arcane reads the lifecycle label and executes its value as a shell command inside the container. This vulnerability is fixed in 1.13.0.

CVSS v3
8.0
EG Score
9.0(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation2% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
74%
KEV
Not listed

Published

January 15, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Jul 6, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Command Injection in Arcane Updater Lifecycle Labels Enables RCE · Advisory · getarcaneapp/arcane · GitHub

https://github.com/getarcaneapp/arcane/security/advisories/GHSA-gjqq-6r35-w3r8
github_release Patch Available

v1.13.0

Patch available: getarcaneapp/arcane v1.13.0

https://github.com/getarcaneapp/arcane/releases/tag/v1.13.0
github_pr

fix: remove updater lifecycle hooks

Fix merged in getarcaneapp/arcane PR #1468 on 2026-01-14 — awaiting tagged release

https://github.com/getarcaneapp/arcane/pull/1468
github_commit

commit 5a9c2f92e11f (getarcaneapp/arcane)

Fix landed in getarcaneapp/arcane commit 5a9c2f92e11f — awaiting tagged release

https://github.com/getarcaneapp/arcane/commit/5a9c2f92e11f86f8997da8c672844468f930b7e4

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/getarcaneapp/arcane/backend—0.0.0-20260114065515-5a9c2f92e11f—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 106 total refreshes for this CVE.

  1. 2026-08-01 04:15 UTCEPSS rescore
  2. 2026-07-30 01:30 UTCEPSS rescore
  3. 2026-07-27 14:13 UTCEPSS rescore
  4. 2026-07-26 14:54 UTCEPSS rescore
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  11. 2026-07-23 10:19 UTCOSV refresh
  12. 2026-07-23 03:07 UTCEG score recompute
  13. 2026-07-22 14:08 UTCEPSS rescore
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  1. 2026-07-15 16:57 UTCEPSS rescore
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  9. 2026-07-08 15:15 UTCEPSS rescore
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  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
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  14. 2026-07-06 05:32 UTCOSV refresh
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  22. 2026-06-30 23:22 UTCEPSS rescore
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  24. 2026-06-29 14:06 UTCEPSS rescore
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  27. 2026-06-28 04:56 UTCEPSS rescore
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  29. 2026-06-27 03:08 UTCEPSS rescore
  30. 2026-06-25 13:49 UTCEPSS rescore
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  38. 2026-06-21 14:56 UTCEPSS rescore
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  40. 2026-06-21 01:59 UTCEPSS rescore
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  42. 2026-06-19 19:25 UTCEPSS rescore
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  44. 2026-06-18 17:52 UTCEPSS rescore
  45. 2026-06-17 17:53 UTCEPSS rescore
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  47. 2026-06-17 16:43 UTCOSV refresh
  48. 2026-06-16 17:52 UTCEPSS rescore
  49. 2026-06-15 17:48 UTCEPSS rescore
  50. 2026-06-14 23:18 UTCEPSS rescore
  51. 2026-06-13 23:00 UTCEPSS rescore
  52. 2026-06-12 23:12 UTCEPSS rescore
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  55. 2026-06-10 22:18 UTCEPSS rescore
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  60. 2026-06-07 15:25 UTCEPSS rescore
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  62. 2026-06-06 13:47 UTCEPSS rescore
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  65. 2026-06-05 22:47 UTCEPSS rescore
  66. 2026-06-05 06:10 UTCEPSS rescore
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  68. 2026-06-04 13:12 UTCEPSS rescore
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  71. 2026-06-01 13:51 UTCEPSS rescore
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  74. 2026-05-31 22:30 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23520?
CVE-2026-23520 is a critical vulnerability published on January 15, 2026. Arcane provides modern docker management. Prior to 1.13.0, Arcane has a command injection in the updater service. Arcane’s updater service supported lifecycle labels com.getarcaneapp.arcane.lifecycle.pre-update and com.getarcaneapp.arcane.lifecycle.post-update that allowed defining a command to run…
When was CVE-2026-23520 disclosed?
CVE-2026-23520 was first published in the National Vulnerability Database on January 15, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23520 actively exploited?
CVE-2026-23520 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 25.9% of all scored CVEs.
What is the CVSS score of CVE-2026-23520?
CVE-2026-23520 has a CVSS v3 base score of 8.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2026-23520?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23520, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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