CVE-2026-57579

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (51st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-77637 (ENISA EUVD)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: No code on recordExposed 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 Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies.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 65/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
51st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

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 pull request 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 advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
alchemy_cms2.0 ... 7.4.9 (343 versions)
  • 8.2.0 up to 8.2.6: fixed in 8.2.6
  • 8.1.0 up to 8.1.14: fixed in 8.1.14
  • 8.0.0.a up to 8.0.15: fixed in 8.0.15
  • every version up to 7.4.15: fixed in 7.4.15
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.6% · 51st percentile
  2. 2026-10-31 20:53 UTCEG score recompute
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 51st percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.6% · 51st percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  10. 2026-10-25 14:17 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  12. 2026-10-24 05:08 UTCEG score recompute
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  17. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  19. 2026-10-18 03:28 UTCEG score recompute
  20. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  21. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  22. 2026-10-16 13:23 UTCEG score recompute
  23. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  24. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  25. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
Show 60 more
  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  2. 2026-10-12 15:54 UTCEG score recompute
  3. 2026-10-11 19:37 UTCEG score recompute
  4. 2026-10-11 16:52 UTCEG score recompute
  5. 2026-10-11 14:15 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  7. 2026-10-11 06:36 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  9. 2026-10-10 04:53 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  11. 2026-10-08 22:54 UTCEG score recompute
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  13. 2026-10-08 07:54 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  15. 2026-10-06 17:39 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  17. 2026-10-06 04:58 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  19. 2026-10-05 02:15 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  21. 2026-10-04 00:43 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  23. 2026-10-02 22:51 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  25. 2026-10-01 21:25 UTCEG score recompute
  26. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  27. 2026-09-30 17:32 UTCEG score recompute
  28. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  29. 2026-09-29 15:58 UTCEG score recompute
  30. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  31. 2026-09-29 03:16 UTCEG score recompute
  32. 2026-09-28 14:35 UTCEG score recompute
  33. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  34. 2026-09-28 01:54 UTCEG score recompute
  35. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  36. 2026-09-27 00:31 UTCEG score recompute
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  38. 2026-09-26 11:48 UTCEG score recompute
  39. 2026-09-24 21:42 UTCEG score recompute
  40. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  41. 2026-09-23 19:46 UTCEG score recompute
  42. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  43. 2026-09-22 18:23 UTCEG score recompute
  44. 2026-09-22 05:41 UTCEG score recompute
  45. 2026-09-21 04:05 UTCEG score recompute
  46. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  47. 2026-09-20 02:41 UTCEG score recompute
  48. 2026-09-19 01:14 UTCEG score recompute
  49. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  50. 2026-09-17 23:51 UTCEG score recompute
  51. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  52. 2026-09-16 21:30 UTCEG score recompute
  53. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  54. 2026-09-16 08:48 UTCEG score recompute
  55. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  56. 2026-09-14 18:33 UTCEG score recompute
  57. 2026-09-14 17:45 UTCEG score recompute
  58. 2026-09-14 17:27 UTCEG score recompute
  59. 2026-09-14 17:00 UTCEG score recomputeFirst assessed: 7.5 HIGH
  60. 2026-09-14 16:59 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-57579?
CVE-2026-57579 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-57579 published?
The CVE record for CVE-2026-57579 was published on September 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
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 (51st 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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