CVE-2026-57579

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (49th percentile of EPSS-scored CVEs). 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, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Alchemy is an open source content management system engine written in Ruby on Rails. Prior to 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the unauthenticated GET /api/pages/nested endpoint implemented by Api::PagesController#nested in app/controllers/alchemy/api/pages_controller.rb returns an unfiltered page tree because it performs no authorization and does not scope descendants by the caller's ability. Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies. When elements=true is supplied, PageTreeSerializer also returns element and ingredient content from restricted pages because PageTreePreloader and the serializer do not apply an ability check to those records. This issue is fixed in versions 7.4.15, 8.0.15, 8.1.14, and 8.2.6.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
49th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 14, 2026

Last Modified

September 30, 2026

Advisory Details (10)

Auto-updated Sep 14, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v8.1.14

Patch available: AlchemyCMS/alchemy_cms v8.1.14

https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.1.14
github_release Patch Available

v8.0.15

Patch available: AlchemyCMS/alchemy_cms v8.0.15

https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.15
github_release Patch Available

v7.4.15

Patch available: AlchemyCMS/alchemy_cms v7.4.15

https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.15
github_commit Patch Available

commit a082dd0afe18 (AlchemyCMS/alchemy_cms)

Patch available: AlchemyCMS/alchemy_cms v8.0.15 (contains commit a082dd0afe18)

https://github.com/AlchemyCMS/alchemy_cms/commit/a082dd0afe188d199f386a5e1db01987d0de807f
github_commit Patch Available

commit 85702d9fe4e2 (AlchemyCMS/alchemy_cms)

Patch available: AlchemyCMS/alchemy_cms v8.2.6 (contains commit 85702d9fe4e2)

https://github.com/AlchemyCMS/alchemy_cms/commit/85702d9fe4e247649b1358900c5af853e83b4a3a
github_commit Patch Available

commit 8417a2e9dcb0 (AlchemyCMS/alchemy_cms)

Patch available: AlchemyCMS/alchemy_cms v8.3.0 (contains commit 8417a2e9dcb0)

https://github.com/AlchemyCMS/alchemy_cms/commit/8417a2e9dcb00653c8b238f8a040b09532dd4c0f
github_commit Patch Available

commit 5620e76f0d27 (AlchemyCMS/alchemy_cms)

Patch available: AlchemyCMS/alchemy_cms v8.1.14 (contains commit 5620e76f0d27)

https://github.com/AlchemyCMS/alchemy_cms/commit/5620e76f0d274d6f69f34281b7e46d01879f6b99
github_commit Patch Available

commit 30888fb41d8b (AlchemyCMS/alchemy_cms)

Patch available: AlchemyCMS/alchemy_cms v7.4.15 (contains commit 30888fb41d8b)

https://github.com/AlchemyCMS/alchemy_cms/commit/30888fb41d8b71fdfb3b116a7efccd851d73e1f3
github_pr Patch Available

fix(api): authorize nested pages endpoint against restricted content

Patch available: AlchemyCMS/alchemy_cms v8.3.0 (PR #3982 merged 2026-06-18)

https://github.com/AlchemyCMS/alchemy_cms/pull/3982
github Patch Available

Unauthenticated nested page API leaks restricted & unpublished content · Advisory · AlchemyCMS/alchemy_cms · GitHub

https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-mqq5-j7w8-2hgh

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
alchemy_cms8.2.0 ... 8.2.5 (6 versions)8.2.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 40× 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.

  1. 2026-10-04 00:43 UTCEG score recompute
  2. 2026-10-03 14:26 UTCEPSS rescore
  3. 2026-10-02 22:51 UTCEG score recompute
  4. 2026-10-02 17:56 UTCEPSS rescore
  5. 2026-10-01 21:25 UTCEG score recompute
  6. 2026-10-01 19:50 UTCEPSS rescore
  7. 2026-09-30 17:32 UTCEG score recompute
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-29 15:58 UTCEG score recompute
  10. 2026-09-29 15:22 UTCEPSS rescore
  11. 2026-09-29 03:16 UTCEG score recompute
  12. 2026-09-28 14:35 UTCEG score recompute
  13. 2026-09-28 13:51 UTCEPSS rescore
  14. 2026-09-28 01:54 UTCEG score recompute
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 00:31 UTCEG score recompute
  17. 2026-09-26 15:59 UTCEPSS rescore
  18. 2026-09-26 11:48 UTCEG score recompute
  19. 2026-09-24 21:42 UTCEG score recompute
  20. 2026-09-24 14:04 UTCEPSS rescore
  21. 2026-09-23 19:46 UTCEG score recompute
  22. 2026-09-23 17:54 UTCEPSS rescore
  23. 2026-09-22 18:23 UTCEG score recompute
  24. 2026-09-22 05:41 UTCEG score recompute
  25. 2026-09-21 04:05 UTCEG score recompute
Show 15 more
  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 02:41 UTCEG score recompute
  3. 2026-09-19 01:14 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-17 23:51 UTCEG score recompute
  6. 2026-09-17 19:31 UTCEPSS rescore
  7. 2026-09-16 21:30 UTCEG score recompute
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 08:48 UTCEG score recompute
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-14 18:33 UTCEG score recompute
  12. 2026-09-14 17:45 UTCEG score recompute
  13. 2026-09-14 17:27 UTCEG score recompute
  14. 2026-09-14 17:00 UTCEG score recompute
  15. 2026-09-14 16:59 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Same product

1 shown

RubyGems:alchemy_cms

Frequently asked(5)

What is CVE-2026-57579?
CVE-2026-57579 is a high vulnerability published on September 14, 2026. Alchemy is an open source content management system engine written in Ruby on Rails. Prior to 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the unauthenticated GET /api/pages/nested endpoint implemented by Api::PagesController#nested in app/controllers/alchemy/api/pages_controller.rb returns an unfiltered…
When was CVE-2026-57579 disclosed?
CVE-2026-57579 was first published on September 14, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57579 actively exploited?
CVE-2026-57579 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57579?
CVE-2026-57579 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-57579?
A fix for CVE-2026-57579 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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