CVE-2026-41146

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% 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
Trending — 3 sources updated this weekElevated
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

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

facil.io is a C micro-framework for web applications. Prior to commit 5128747363055201d3ecf0e29bf0a961703c9fa0, fio_json_parse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at ~100% instead of returning a parse error. Because iodine vendors the same parser code, the issue also affects iodine when it parses attacker-controlled JSON. The smallest reproducer I found is [i. The quoted-value form that originally exposed the issue, [""i, reaches the same bug because the parser tolerates missing commas and then treats the trailing i as the start of another value. Commit 5128747363055201d3ecf0e29bf0a961703c9fa0 fixes the issue.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: Attend

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
Severity87% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
21.6%
KEV
Not listed

Published

April 22, 2026

Last Modified

April 29, 2026

Advisory Details (2)

Auto-updated Apr 29, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Uncontrolled resource consumption and loop with unreachable exit condition in facil.io and downstream iodine ruby gem · Advisory · boazsegev/facil.io · GitHub

https://github.com/boazsegev/facil.io/security/advisories/GHSA-2x79-gwq3-vxxm
generic

Merge commit from fork · boazsegev/facil.io@5128747 · GitHub

https://github.com/boazsegev/facil.io/commit/5128747363055201d3ecf0e29bf0a961703c9fa0

Vendor Advisories for CVE-2026-41146(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
rubygemsiodine—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
iodine0.0.1 ... 0.7.9 (135 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 35× 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 113 total refreshes for this CVE.

  1. 2026-07-23 03:11 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 19:02 UTCOSV refresh
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  1. 2026-07-04 06:31 UTCEPSS rescore
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  22. 2026-06-15 04:17 UTCGHSA enrichment
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  24. 2026-06-13 23:00 UTCEPSS rescore
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  27. 2026-06-12 12:43 UTCGHSA enrichment
  28. 2026-06-12 01:46 UTCGHSA enrichment
  29. 2026-06-11 14:55 UTCGHSA enrichment
  30. 2026-06-11 14:00 UTCEPSS rescore
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  34. 2026-06-10 12:31 UTCGHSA enrichment
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  36. 2026-06-09 14:49 UTCGHSA enrichment
  37. 2026-06-09 03:59 UTCGHSA enrichment
  38. 2026-06-08 14:17 UTCEPSS rescore
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  40. 2026-06-08 08:42 UTCGHSA enrichment
  41. 2026-06-07 21:51 UTCGHSA enrichment
  42. 2026-06-07 15:25 UTCEPSS rescore
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  44. 2026-06-07 11:00 UTCGHSA enrichment
  45. 2026-06-07 00:09 UTCGHSA enrichment
  46. 2026-06-06 13:47 UTCEPSS rescore
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  48. 2026-06-06 06:01 UTCGHSA enrichment
  49. 2026-06-05 22:47 UTCEPSS rescore
  50. 2026-06-05 19:10 UTCGHSA enrichment
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  53. 2026-06-05 03:36 UTCGHSA enrichment
  54. 2026-06-04 14:16 UTCGHSA enrichment
  55. 2026-06-04 13:12 UTCEPSS rescore
  56. 2026-06-04 13:12 UTCEPSS rescore
  57. 2026-06-04 01:02 UTCGHSA enrichment
  58. 2026-06-03 13:51 UTCGHSA enrichment
  59. 2026-06-03 02:48 UTCGHSA enrichment
  60. 2026-06-02 20:13 UTCEPSS rescore
  61. 2026-06-02 15:56 UTCGHSA enrichment
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  74. 2026-05-28 13:44 UTCEPSS rescore
  75. 2026-05-28 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-41146?
CVE-2026-41146 is a high vulnerability published on April 22, 2026. facil.io is a C micro-framework for web applications. Prior to commit 5128747363055201d3ecf0e29bf0a961703c9fa0, fiojsonparse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at ~100% instead of returning a…
When was CVE-2026-41146 disclosed?
CVE-2026-41146 was first published in the National Vulnerability Database on April 22, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41146 actively exploited?
CVE-2026-41146 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41146?
CVE-2026-41146 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-41146?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41146, 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.

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