CVE-2018-1000076

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 24% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a mis-signed gem could be installed, as the tarball would contain multiple gem signatures.. This vulnerability appears to have been fixed in 2.7.6.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
86.0%
KEV
Not listed

Published

March 13, 2018

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Jul 6, 2026
Patch available. Sources: redhat, github_commit.
github_commit Patch Available

commit f5042b879259 (rubygems/rubygems)

Patch available: rubygems/rubygems v4.0.1 (contains commit f5042b879259)

https://github.com/rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2020:0663
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat

https://access.redhat.com/errata/RHSA-2020:0591
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.5 Extended Update Support.

https://access.redhat.com/errata/RHSA-2020:0542
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:2028
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:3731
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:3730
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:3729
generic

2.7.6 Released - RubyGems Blog

http://blog.rubygems.org/2018/02/15/2.7.6-released.html

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturuby2.3-tcltk (2.3.1-2~16.04.7) @ xenial2026-05-28ubuntu
redhatruby-0:2.0.0.648-36.el7_62020-03-03redhat
redhatruby-0:2.0.0.648-35.el7_42020-02-25redhat
redhatruby-0:2.0.0.648-35.el7_52020-02-19redhat
redhatruby-0:2.0.0.648-36.el72019-08-06redhat
redhatrh-ruby25-ruby-0:2.5.3-6.el72018-11-29redhat
redhatrh-ruby23-ruby-0:2.3.8-69.el72018-11-29redhat
redhatrh-ruby24-ruby-0:2.4.5-91.el72018-11-29redhat

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

(2 across 2 ecosystems)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.jruby:jruby-stdlib1.6.0 ... 9.1.9.0 (73 versions)9.1.16.0—
RubyGems(1)
PackageVulnerable rangeFixed inDependents
rubygems-update2.2.0 ... 2.7.5 (41 versions)2.7.6—

Weakness Classification(1)

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

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 44× 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. 2026-07-15 16:55 UTCEPSS rescore
  2. 2026-07-15 16:54 UTCEPSS rescore
  3. 2026-07-15 01:56 UTCEPSS rescore
  4. 2026-07-15 01:56 UTCEPSS rescore
  5. 2026-07-13 22:26 UTCEPSS rescore
  6. 2026-07-13 22:26 UTCEPSS rescore
  7. 2026-07-12 05:43 UTCEPSS rescore
  8. 2026-07-11 08:24 UTCEPSS rescore
  9. 2026-07-09 19:06 UTCEPSS rescore
  10. 2026-07-08 15:11 UTCEPSS rescore
  11. 2026-07-07 13:42 UTCEPSS rescore
  12. 2026-07-06 16:24 UTCEPSS rescore
  13. 2026-07-06 16:24 UTCEPSS rescore
  14. 2026-07-06 02:20 UTCEPSS rescore
  15. 2026-07-06 02:20 UTCEPSS rescore
  16. 2026-07-05 02:27 UTCEPSS rescore
  17. 2026-07-04 11:56 UTCOSV refresh
  18. 2026-07-04 06:28 UTCEPSS rescore
  19. 2026-07-04 06:28 UTCEPSS rescore
  20. 2026-07-02 16:54 UTCEPSS rescore
  21. 2026-07-01 15:03 UTCEPSS rescore
  22. 2026-06-30 23:19 UTCEPSS rescore
  23. 2026-06-30 23:19 UTCEPSS rescore
  24. 2026-06-29 14:03 UTCEPSS rescore
  25. 2026-06-28 14:04 UTCEPSS rescore
Show 60 more
  1. 2026-06-28 04:53 UTCEPSS rescore
  2. 2026-06-28 04:53 UTCEPSS rescore
  3. 2026-06-27 03:06 UTCEPSS rescore
  4. 2026-06-25 13:47 UTCEPSS rescore
  5. 2026-06-24 14:02 UTCEPSS rescore
  6. 2026-06-24 14:02 UTCEPSS rescore
  7. 2026-06-23 21:30 UTCEPSS rescore
  8. 2026-06-23 21:30 UTCEPSS rescore
  9. 2026-06-22 14:23 UTCEPSS rescore
  10. 2026-06-22 14:23 UTCEPSS rescore
  11. 2026-06-21 14:54 UTCEPSS rescore
  12. 2026-06-21 14:54 UTCEPSS rescore
  13. 2026-06-21 01:57 UTCEPSS rescore
  14. 2026-06-21 01:57 UTCEPSS rescore
  15. 2026-06-19 19:23 UTCEPSS rescore
  16. 2026-06-19 19:23 UTCEPSS rescore
  17. 2026-06-18 17:50 UTCEPSS rescore
  18. 2026-06-17 17:50 UTCEPSS rescore
  19. 2026-06-16 17:50 UTCEPSS rescore
  20. 2026-06-15 23:43 UTCOSV refresh
  21. 2026-06-15 17:45 UTCEPSS rescore
  22. 2026-06-14 23:14 UTCEPSS rescore
  23. 2026-06-14 23:14 UTCEPSS rescore
  24. 2026-06-13 22:58 UTCEPSS rescore
  25. 2026-06-13 22:57 UTCEPSS rescore
  26. 2026-06-12 23:09 UTCEPSS rescore
  27. 2026-06-12 23:09 UTCEPSS rescore
  28. 2026-06-11 13:57 UTCEPSS rescore
  29. 2026-06-10 22:15 UTCEPSS rescore
  30. 2026-06-10 13:19 UTCEPSS rescore
  31. 2026-06-08 14:14 UTCEPSS rescore
  32. 2026-06-08 14:14 UTCEPSS rescore
  33. 2026-06-07 15:22 UTCEPSS rescore
  34. 2026-06-07 15:22 UTCEPSS rescore
  35. 2026-06-06 13:45 UTCEPSS rescore
  36. 2026-06-06 13:45 UTCEPSS rescore
  37. 2026-06-05 22:44 UTCEPSS rescore
  38. 2026-06-05 22:44 UTCEPSS rescore
  39. 2026-06-05 06:08 UTCEPSS rescore
  40. 2026-06-05 06:08 UTCEPSS rescore
  41. 2026-06-04 13:10 UTCEPSS rescore
  42. 2026-06-04 13:10 UTCEPSS rescore
  43. 2026-06-02 20:11 UTCEPSS rescore
  44. 2026-06-02 20:11 UTCEPSS rescore
  45. 2026-06-01 13:49 UTCEPSS rescore
  46. 2026-06-01 13:49 UTCEPSS rescore
  47. 2026-05-31 22:28 UTCEPSS rescore
  48. 2026-05-31 00:14 UTCEPSS rescore
  49. 2026-05-31 00:14 UTCEPSS rescore
  50. 2026-05-29 13:41 UTCEPSS rescore
  51. 2026-05-28 13:42 UTCEPSS rescore
  52. 2026-05-28 13:42 UTCEPSS rescore
  53. 2026-05-28 10:34 UTCEG score recompute
  54. 2026-05-28 10:34 UTCVendor advisory
  55. 2026-05-27 13:38 UTCEPSS rescore
  56. 2026-05-27 13:38 UTCEPSS rescore
  57. 2026-05-27 03:14 UTCOSV refresh
  58. 2026-05-26 13:42 UTCEPSS rescore
  59. 2026-05-26 07:17 UTCEPSS rescore
  60. 2026-05-26 07:17 UTCEPSS rescore

Frequently asked(5)

What is CVE-2018-1000076?
CVE-2018-1000076 is a critical vulnerability published on March 13, 2018. RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a…
When was CVE-2018-1000076 disclosed?
CVE-2018-1000076 was first published in the National Vulnerability Database on March 13, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-1000076 actively exploited?
CVE-2018-1000076 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-1000076?
CVE-2018-1000076 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-1000076?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1000076, 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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