CVE-2026-33176

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 54% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. 1e10000), which BigDecimal expands into extremely large decimal representations. This can cause excessive memory allocation and CPU consumption when the expanded number is formatted, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
56%
KEV
Not listed

Published

March 23, 2026

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Aug 2, 2026
Patch available. Sources: github, github_commit, github_release.
github Patch Available

Possible DoS vulnerability in Active Support number helpers · Advisory · rails/rails · GitHub

https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9
github_release Patch Available

8.1.2.1

Patch available: rails/rails v8.1.2.1

https://github.com/rails/rails/releases/tag/v8.1.2.1
github_release Patch Available

8.0.4.1

Patch available: rails/rails v8.0.4.1

https://github.com/rails/rails/releases/tag/v8.0.4.1
github_release Patch Available

7.2.3.1

Patch available: rails/rails v7.2.3.1

https://github.com/rails/rails/releases/tag/v7.2.3.1
github_commit

commit ee2c59e730e5 (rails/rails)

Fix landed in rails/rails commit ee2c59e730e5 — awaiting tagged release

https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856
github_commit

commit ebd6be18120d (rails/rails)

Fix landed in rails/rails commit ebd6be18120d — awaiting tagged release

https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a
github_commit

commit 19dbab51ca08 (rails/rails)

Fix landed in rails/rails commit 19dbab51ca08 — awaiting tagged release

https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb

Vendor Advisories for CVE-2026-33176(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
redhatrubygem-activesupport-0:6.1.7.8-2.el9sat2026-05-07redhat
redhatrubygem-activesupport-0:7.0.8.7-2.el9sat2026-05-07redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
rails2:6.0.3.7+dfsg-2 ... 2:7.2.3.2+dfsg-2 (72 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
rails2:6.1.7.10+dfsg-1~deb12u1 ... 2:7.2.3.2+dfsg-2 (38 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rails2:7.2.2.1+dfsg-7 ... 2:7.2.3.2+dfsg-2 (10 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
rails2:7.2.2.1+dfsg-7 ... 2:7.2.3+dfsg-3 (7 versions)2:7.2.3.1+dfsg-1—
RubyGems(1)
PackageVulnerable rangeFixed inDependents
activesupport1.0.0 ... 7.2.3 (482 versions)7.2.3.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 03:11 UTCEPSS rescore
  7. 2026-09-13 16:47 UTCEPSS rescore
  8. 2026-09-12 15:01 UTCEPSS rescore
  9. 2026-09-11 14:52 UTCEPSS rescore
  10. 2026-09-10 09:34 UTCEPSS rescore
  11. 2026-09-08 22:00 UTCEPSS rescore
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-04 05:06 UTCEPSS rescore
  16. 2026-09-02 16:08 UTCOSV refresh
  17. 2026-09-02 14:11 UTCEPSS rescore
  18. 2026-09-01 13:53 UTCEPSS rescore
  19. 2026-09-01 04:39 UTCEPSS rescore
  20. 2026-09-01 04:39 UTCEPSS rescore
  21. 2026-08-30 19:17 UTCEPSS rescore
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-27 14:25 UTCEPSS rescore
  25. 2026-08-26 14:46 UTCEPSS rescore
Show 57 more
  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 14:17 UTCEPSS rescore
  3. 2026-08-23 00:19 UTCEPSS rescore
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 10:43 UTCEG score recompute
  12. 2026-08-16 10:43 UTCVendor advisory
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 19:44 UTCVendor advisory
  16. 2026-08-14 06:55 UTCEG score recompute
  17. 2026-08-14 06:55 UTCVendor advisory
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 21:37 UTCEG score recompute
  20. 2026-08-12 21:37 UTCVendor advisory
  21. 2026-08-12 13:50 UTCEPSS rescore
  22. 2026-08-11 21:12 UTCEG score recompute
  23. 2026-08-11 21:12 UTCVendor advisory
  24. 2026-08-11 04:15 UTCEG score recompute
  25. 2026-08-11 04:15 UTCVendor advisory
  26. 2026-08-11 00:00 UTCEPSS rescore
  27. 2026-08-10 06:24 UTCVendor advisory
  28. 2026-08-09 18:28 UTCEG score recompute
  29. 2026-08-09 18:28 UTCVendor advisory
  30. 2026-08-09 13:46 UTCEPSS rescore
  31. 2026-08-09 06:32 UTCEG score recompute
  32. 2026-08-09 06:32 UTCVendor advisory
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-08 04:49 UTCVendor advisory
  35. 2026-08-07 16:53 UTCEG score recompute
  36. 2026-08-07 16:53 UTCVendor advisory
  37. 2026-08-06 19:09 UTCEG score recompute
  38. 2026-08-06 19:09 UTCVendor advisory
  39. 2026-08-06 13:46 UTCEPSS rescore
  40. 2026-08-06 01:15 UTCEG score recompute
  41. 2026-08-06 01:15 UTCVendor advisory
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-04 15:10 UTCEPSS rescore
  44. 2026-08-04 10:38 UTCEPSS rescore
  45. 2026-08-03 23:59 UTCEG score recompute
  46. 2026-08-03 23:59 UTCVendor advisory
  47. 2026-08-03 10:36 UTCEPSS rescore
  48. 2026-08-02 15:52 UTCEG score recompute▲ 0.90
  49. 2026-08-02 15:52 UTCVendor advisory
  50. 2026-08-02 02:27 UTCEPSS rescore
  51. 2026-08-01 04:16 UTCEPSS rescore
  52. 2026-07-30 16:28 UTCEPSS rescore
  53. 2026-07-30 01:30 UTCEPSS rescore
  54. 2026-07-27 14:13 UTCEPSS rescore
  55. 2026-07-27 12:50 UTCEG score recompute
  56. 2026-07-27 12:50 UTCVendor advisory
  57. 2026-07-27 12:50 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33176?
CVE-2026-33176 is a high vulnerability published on March 23, 2026. Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. 1e10000), which BigDecimal expands into extremely large…
When was CVE-2026-33176 disclosed?
CVE-2026-33176 was first published in the National Vulnerability Database on March 23, 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-2026-33176 actively exploited?
CVE-2026-33176 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.7% of all scored CVEs.
What is the CVSS score of CVE-2026-33176?
CVE-2026-33176 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-33176?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33176, 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-2026-33176

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