CVE-2015-7576

LOWNVD 3.73.7—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.7 under NVD CVSS v3. EPSS exploit probability: 4.9%, top 9% 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
3.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 3.7Exploit: None knownExposed: 0

A fix is available — apply it.

The http_basic_authenticate_with method in actionpack/lib/action_controller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not use a constant-time algorithm for verifying credentials, which makes it easier for remote attackers to bypass authentication by measuring timing differences.

CVSS v3
3.7
EG Score
3.7(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

February 16, 2016

Last Modified

June 17, 2026

References (26)

Vendor Advisories for CVE-2015-7576(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatruby193-rubygem-activesupport-1:3.2.8-6.el72016-03-15redhat
redhatror40-rubygem-activesupport-1:4.0.2-4.el72016-03-15redhat
redhatrh-ror41-rubygem-activesupport-1:4.1.5-3.el72016-02-24redhat

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

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
rails—2:4.2.5.1-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
rails—2:4.2.5.1-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rails—2:4.2.5.1-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
rails—2:4.2.5.1-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
ruby-actionpack-3.23.2.6-6, 3.2.6-6+deb7u1, 3.2.6-6+deb7u23.2.6-6+deb7u3—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
rails2:4.1.8-12:4.1.8-1+deb8u1—
RubyGems(1)
PackageVulnerable rangeFixed inDependents
actionpack4.0.0 ... 4.1.9.rc1 (60 versions)4.1.14.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 134 total refreshes for this CVE.

  1. 2026-09-06 13:42 UTCEPSS rescore
  2. 2026-09-04 13:55 UTCEPSS rescore
  3. 2026-09-02 14:07 UTCEPSS rescore
  4. 2026-09-01 13:48 UTCEPSS rescore
  5. 2026-09-01 03:31 UTCEPSS rescore
  6. 2026-08-31 06:55 UTCOSV refresh
  7. 2026-08-27 14:20 UTCEPSS rescore
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  18. 2026-08-14 13:54 UTCOSV refresh
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  21. 2026-08-09 13:42 UTCEPSS rescore
  22. 2026-08-08 16:32 UTCEPSS rescore
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  24. 2026-08-06 13:42 UTCEPSS rescore
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  1. 2026-08-04 15:04 UTCEPSS rescore
  2. 2026-08-04 10:31 UTCEPSS rescore
  3. 2026-08-01 04:11 UTCEPSS rescore
  4. 2026-07-30 02:24 UTCOSV refresh
  5. 2026-07-30 01:26 UTCEPSS rescore
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  7. 2026-07-28 15:31 UTCEPSS rescore
  8. 2026-07-25 14:13 UTCEPSS rescore
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  10. 2026-07-23 14:14 UTCEPSS rescore
  11. 2026-07-23 01:19 UTCEG score recompute
  12. 2026-07-23 00:21 UTCEG score recompute
  13. 2026-07-22 21:59 UTCEG score recompute
  14. 2026-07-22 14:04 UTCEPSS rescore
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  22. 2026-07-18 10:00 UTCEPSS rescore
  23. 2026-07-16 16:59 UTCEPSS rescore
  24. 2026-07-15 16:54 UTCEPSS rescore
  25. 2026-07-15 16:54 UTCEPSS rescore
  26. 2026-07-15 01:56 UTCEPSS rescore
  27. 2026-07-13 22:26 UTCEPSS rescore
  28. 2026-07-13 22:26 UTCEPSS rescore
  29. 2026-07-12 11:37 UTCOSV refresh
  30. 2026-07-12 05:42 UTCEPSS rescore
  31. 2026-07-11 08:23 UTCEPSS rescore
  32. 2026-07-09 19:05 UTCEPSS rescore
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  34. 2026-07-08 15:10 UTCEPSS rescore
  35. 2026-07-07 13:42 UTCEPSS rescore
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  37. 2026-07-06 16:24 UTCEPSS rescore
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  42. 2026-06-30 23:19 UTCEPSS rescore
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  44. 2026-06-29 14:03 UTCEPSS rescore
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  46. 2026-06-28 14:04 UTCEPSS rescore
  47. 2026-06-28 04:53 UTCEPSS rescore
  48. 2026-06-27 03:05 UTCEPSS rescore
  49. 2026-06-25 13:47 UTCEPSS rescore
  50. 2026-06-25 13:47 UTCEPSS rescore
  51. 2026-06-24 14:02 UTCEPSS rescore
  52. 2026-06-24 14:02 UTCEPSS rescore
  53. 2026-06-23 21:30 UTCEPSS rescore
  54. 2026-06-23 17:00 UTCOSV refresh
  55. 2026-06-22 14:23 UTCEPSS rescore
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  57. 2026-06-21 14:54 UTCEPSS rescore
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  67. 2026-06-14 23:14 UTCEPSS rescore
  68. 2026-06-13 22:57 UTCEPSS rescore
  69. 2026-06-12 23:09 UTCEPSS rescore
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  71. 2026-06-11 13:57 UTCEPSS rescore
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  73. 2026-06-10 22:15 UTCEPSS rescore
  74. 2026-06-10 13:18 UTCEPSS rescore
  75. 2026-06-08 14:14 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2015-7576?
CVE-2015-7576 is a low vulnerability published on February 16, 2016. The httpbasicauthenticatewith method in actionpack/lib/actioncontroller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not use a…
When was CVE-2015-7576 disclosed?
CVE-2015-7576 was first published in the National Vulnerability Database on February 16, 2016, 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-2015-7576 actively exploited?
CVE-2015-7576 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.5% of all scored CVEs.
What is the CVSS score of CVE-2015-7576?
CVE-2015-7576 has a CVSS v3 base score of 3.7 (NVD).
How do I remediate CVE-2015-7576?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-7576, 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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