CVE-2026-54696

LOWPre-NVD 3.73.7—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% 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, secondary
Trending — 3 sources updated this week
3.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.7Exploit: None knownExposed: 0

A fix is available — apply it.

Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.

CVSS v3
3.7
EG Score
3.7(medium)
EG Risk
21(Track)
EG Risk 21/100SSVC: 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
Severity37% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 2026

References (3)

Vendor Advisories for CVE-2026-54696(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatruby3-4-main-3.4.10-31.5.hum12026-07-30redhat
redhatruby4-0-main-4.0.6-37.1.hum12026-07-29redhat

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

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ruby-json2.15.2+dfsg-1 ... 2.9.1+dfsg-1 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ruby-json2.15.2+dfsg-1 ... 2.9.1+dfsg-1 (6 versions)2.19.9+dfsg-1—
RubyGems(1)
PackageVulnerable rangeFixed inDependents
json2.10.0 ... 2.9.1 (36 versions)2.19.9—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 42× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 10:28 UTCEG score recompute
  4. 2026-08-22 10:28 UTCVendor advisory
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 11:10 UTCEG score recompute
  9. 2026-08-19 11:10 UTCVendor advisory
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 11:50 UTCEG score recompute
  14. 2026-08-16 11:50 UTCVendor advisory
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 12:32 UTCEG score recompute
  19. 2026-08-13 12:32 UTCVendor advisory
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 13:09 UTCEG score recompute
  23. 2026-08-10 13:09 UTCVendor advisory
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-08 16:37 UTCEPSS rescore
Show 58 more
  1. 2026-08-07 13:52 UTCEG score recompute
  2. 2026-08-07 13:52 UTCVendor advisory
  3. 2026-08-06 13:47 UTCEPSS rescore
  4. 2026-08-05 19:17 UTCEPSS rescore
  5. 2026-08-04 15:10 UTCEPSS rescore
  6. 2026-08-04 14:35 UTCEG score recompute
  7. 2026-08-04 14:35 UTCVendor advisory
  8. 2026-08-04 10:39 UTCEPSS rescore
  9. 2026-08-03 10:36 UTCEPSS rescore
  10. 2026-08-02 02:27 UTCEPSS rescore
  11. 2026-08-01 12:10 UTCEG score recompute
  12. 2026-08-01 12:10 UTCVendor advisory
  13. 2026-08-01 04:16 UTCEPSS rescore
  14. 2026-07-30 16:28 UTCEPSS rescore
  15. 2026-07-30 01:30 UTCEPSS rescore
  16. 2026-07-29 12:53 UTCEG score recompute
  17. 2026-07-28 15:37 UTCEPSS rescore
  18. 2026-07-26 14:54 UTCEPSS rescore
  19. 2026-07-26 13:35 UTCEG score recompute
  20. 2026-07-25 14:18 UTCEPSS rescore
  21. 2026-07-24 14:18 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 03:19 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:25 UTCEPSS rescore
  26. 2026-07-20 17:08 UTCEPSS rescore
  27. 2026-07-19 14:31 UTCEPSS rescore
  28. 2026-07-19 14:31 UTCEPSS rescore
  29. 2026-07-19 02:29 UTCEPSS rescore
  30. 2026-07-18 10:04 UTCEPSS rescore
  31. 2026-07-16 17:03 UTCEPSS rescore
  32. 2026-07-15 16:57 UTCEPSS rescore
  33. 2026-07-15 16:57 UTCEPSS rescore
  34. 2026-07-15 02:00 UTCEPSS rescore
  35. 2026-07-15 02:00 UTCEPSS rescore
  36. 2026-07-13 22:31 UTCEPSS rescore
  37. 2026-07-13 06:13 UTCEPSS rescore
  38. 2026-07-13 06:13 UTCEPSS rescore
  39. 2026-07-12 05:46 UTCEPSS rescore
  40. 2026-07-11 08:27 UTCEPSS rescore
  41. 2026-07-11 08:27 UTCEPSS rescore
  42. 2026-07-09 19:10 UTCEPSS rescore
  43. 2026-07-09 19:10 UTCEPSS rescore
  44. 2026-07-08 15:16 UTCEPSS rescore
  45. 2026-07-08 15:16 UTCEPSS rescore
  46. 2026-07-07 13:46 UTCEPSS rescore
  47. 2026-07-07 13:46 UTCEPSS rescore
  48. 2026-07-06 16:27 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 02:23 UTCEPSS rescore
  51. 2026-07-06 02:23 UTCEPSS rescore
  52. 2026-07-05 02:31 UTCEPSS rescore
  53. 2026-07-05 02:30 UTCEPSS rescore
  54. 2026-07-04 06:31 UTCEPSS rescore
  55. 2026-07-04 06:31 UTCEPSS rescore
  56. 2026-07-01 15:07 UTCEPSS rescore
  57. 2026-07-01 01:23 UTCEG score recompute
  58. 2026-07-01 01:19 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-54696?
CVE-2026-54696 is a low vulnerability published on June 30, 2026. Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON…
When was CVE-2026-54696 disclosed?
CVE-2026-54696 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54696 actively exploited?
CVE-2026-54696 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 69.0% of all scored CVEs.
What is the CVSS score of CVE-2026-54696?
CVE-2026-54696 has a CVSS v3 base score of 3.7 (NVD).
How do I remediate CVE-2026-54696?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54696, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54696

Explore →

Is Your Infrastructure Affected by CVE-2026-54696?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs