CVE-2026-33174

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

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

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. bytes=0-) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. 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
38(Track)
EG Risk 38/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

March 24, 2026

Last Modified

June 17, 2026

Advisory Details (7)

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

Possible DoS vulnerability in Active Storage proxy mode via Range requests · Advisory · rails/rails · GitHub

https://github.com/rails/rails/security/advisories/GHSA-r46p-8f7g-vvvg
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 8159a9c3de3f (rails/rails)

Fix landed in rails/rails commit 8159a9c3de3f — awaiting tagged release

https://github.com/rails/rails/commit/8159a9c3de3f27a2bcf2866b8bf9ceb9075e229b
github_commit

commit 42012eaaa88d (rails/rails)

Fix landed in rails/rails commit 42012eaaa88d — awaiting tagged release

https://github.com/rails/rails/commit/42012eaaa88dfc7d0030161b2bc8074a7bbce92a
github_commit

commit 2cd933c366b7 (rails/rails)

Fix landed in rails/rails commit 2cd933c366b7 — awaiting tagged release

https://github.com/rails/rails/commit/2cd933c366b777f873d4d590127da2f4a25e4ba5

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
activestorage0.1 ... 7.2.3 (161 versions)7.2.3.1—

Weakness Classification(1)

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 39 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 02:14 UTCEPSS rescore
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 06:55 UTCEG score recompute
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-12 21:37 UTCEG score recompute
  17. 2026-08-12 13:50 UTCEPSS rescore
  18. 2026-08-11 21:12 UTCEG score recompute
  19. 2026-08-11 04:15 UTCEG score recompute
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-09 18:16 UTCEG score recompute
  22. 2026-08-09 13:46 UTCEPSS rescore
  23. 2026-08-09 06:31 UTCEG score recompute
  24. 2026-08-08 16:37 UTCEPSS rescore
  25. 2026-08-07 16:53 UTCEG score recompute
  26. 2026-08-06 19:09 UTCEG score recompute
  27. 2026-08-06 13:46 UTCEPSS rescore
  28. 2026-08-06 01:15 UTCEG score recompute
  29. 2026-08-05 19:17 UTCEPSS rescore
  30. 2026-08-04 15:10 UTCEPSS rescore
  31. 2026-08-04 10:38 UTCEPSS rescore
  32. 2026-08-03 23:59 UTCEG score recompute
  33. 2026-08-03 10:36 UTCEPSS rescore
  34. 2026-08-02 15:52 UTCEG score recompute
  35. 2026-08-02 02:27 UTCEPSS rescore
  36. 2026-08-01 04:16 UTCEPSS rescore
  37. 2026-07-30 16:28 UTCEPSS rescore
  38. 2026-07-30 01:30 UTCEPSS rescore
  39. 2026-07-27 14:31 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-33174?
CVE-2026-33174 is a high vulnerability published on March 24, 2026. Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request…
When was CVE-2026-33174 disclosed?
CVE-2026-33174 was first published in the National Vulnerability Database on March 24, 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-2026-33174 actively exploited?
CVE-2026-33174 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 52.2% of all scored CVEs.
What is the CVSS score of CVE-2026-33174?
CVE-2026-33174 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-33174?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33174, 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

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