CVE-2026-79769

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Nokogiri versions before 1.19.4 contain a possible invalid (out-of-bounds) memory read in the protected internal Node#initialize_copy_with_args helper behind Node#dup and #clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a non-Node argument (e.g., a Namespace), it reads an xmlNs out of bounds, crashing the process. This is only triggerable by a programming error and cannot be triggered by untrusted input or normal use of the public API. Only CRuby is affected. Version 1.19.4 adds a type check and raises TypeError.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity55% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 25, 2026

Last Modified

September 24, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

Possible invalid memory read when calling `Nokogiri::XML::Node#initialize_copy_with_args` with incorrect argument type · Advisory · sparklemotion/nokogiri · GitHub

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-g9g8-vgvw-g3vf

Vendor Advisories for CVE-2026-79769(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri1.13.10+dfsg-2 ... 1.19.4+dfsg-1 (17 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri1.18.10+dfsg-1 ... 1.19.4+dfsg-1 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri1.18.10+dfsg-1 ... 1.19.3+dfsg-1 (6 versions)
  • every version up to 1.19.4+dfsg-1: fixed in 1.19.4+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 82× 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 126 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-10 12:02 UTCEG score recompute
  3. 2026-10-10 12:02 UTCGHSA enrichment
  4. 2026-10-09 20:07 UTCEPSS rescore
  5. 2026-10-09 04:23 UTCEG score recompute
  6. 2026-10-09 04:23 UTCGHSA enrichment
  7. 2026-10-08 17:13 UTCEPSS rescore
  8. 2026-10-08 03:17 UTCEG score recompute
  9. 2026-10-08 03:17 UTCGHSA enrichment
  10. 2026-10-07 23:48 UTCEPSS rescore
  11. 2026-10-06 21:14 UTCEG score recompute
  12. 2026-10-06 21:14 UTCGHSA enrichment
  13. 2026-10-06 15:18 UTCEPSS rescore
  14. 2026-10-05 20:32 UTCEG score recompute
  15. 2026-10-05 20:31 UTCGHSA enrichment
  16. 2026-10-05 17:43 UTCEPSS rescore
  17. 2026-10-04 23:22 UTCEPSS rescore
  18. 2026-10-04 19:50 UTCGHSA enrichment
  19. 2026-10-03 16:26 UTCEG score recompute
  20. 2026-10-03 16:26 UTCGHSA enrichment
  21. 2026-10-03 14:26 UTCEPSS rescore
  22. 2026-10-02 17:57 UTCEPSS rescore
  23. 2026-10-02 07:59 UTCEG score recompute
  24. 2026-10-02 07:59 UTCGHSA enrichment
  25. 2026-10-01 19:50 UTCEPSS rescore
Show 75 more
  1. 2026-10-01 07:17 UTCEG score recompute
  2. 2026-10-01 07:17 UTCGHSA enrichment
  3. 2026-09-30 06:47 UTCEG score recompute
  4. 2026-09-30 06:47 UTCGHSA enrichment
  5. 2026-09-29 15:24 UTCEPSS rescore
  6. 2026-09-28 23:22 UTCEG score recompute
  7. 2026-09-28 23:22 UTCGHSA enrichment
  8. 2026-09-28 13:52 UTCEPSS rescore
  9. 2026-09-27 22:35 UTCEG score recompute
  10. 2026-09-27 22:35 UTCGHSA enrichment
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-26 22:05 UTCEG score recompute
  13. 2026-09-26 22:05 UTCGHSA enrichment
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-26 00:28 UTCEPSS rescore
  16. 2026-09-24 21:20 UTCEG score recompute
  17. 2026-09-24 21:20 UTCGHSA enrichment
  18. 2026-09-24 14:04 UTCEPSS rescore
  19. 2026-09-24 10:42 UTCEG score recompute
  20. 2026-09-24 10:42 UTCGHSA enrichment
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 10:12 UTCEG score recompute
  23. 2026-09-23 10:12 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 09:42 UTCEG score recompute
  26. 2026-09-22 09:42 UTCGHSA enrichment
  27. 2026-09-21 21:09 UTCEPSS rescore
  28. 2026-09-21 09:11 UTCEG score recompute
  29. 2026-09-21 09:11 UTCGHSA enrichment
  30. 2026-09-20 20:16 UTCEPSS rescore
  31. 2026-09-20 08:41 UTCEG score recompute
  32. 2026-09-20 08:41 UTCGHSA enrichment
  33. 2026-09-19 07:52 UTCEG score recompute
  34. 2026-09-19 07:52 UTCGHSA enrichment
  35. 2026-09-18 19:28 UTCEPSS rescore
  36. 2026-09-18 07:23 UTCEG score recompute
  37. 2026-09-18 07:23 UTCGHSA enrichment
  38. 2026-09-17 06:53 UTCEG score recompute
  39. 2026-09-17 06:53 UTCGHSA enrichment
  40. 2026-09-16 14:08 UTCEPSS rescore
  41. 2026-09-16 06:11 UTCEG score recompute
  42. 2026-09-16 06:11 UTCGHSA enrichment
  43. 2026-09-16 05:15 UTCEPSS rescore
  44. 2026-09-15 05:41 UTCEG score recompute
  45. 2026-09-15 05:40 UTCGHSA enrichment
  46. 2026-09-15 03:12 UTCEPSS rescore
  47. 2026-09-15 03:12 UTCEPSS rescore
  48. 2026-09-14 04:15 UTCEG score recompute
  49. 2026-09-14 04:15 UTCGHSA enrichment
  50. 2026-09-13 03:46 UTCEG score recompute
  51. 2026-09-13 03:46 UTCGHSA enrichment
  52. 2026-09-12 03:16 UTCEG score recompute
  53. 2026-09-12 03:16 UTCGHSA enrichment
  54. 2026-09-11 14:53 UTCEPSS rescore
  55. 2026-09-11 14:53 UTCEPSS rescore
  56. 2026-09-11 02:46 UTCEG score recompute
  57. 2026-09-11 02:46 UTCGHSA enrichment
  58. 2026-09-10 02:15 UTCGHSA enrichment
  59. 2026-09-09 01:45 UTCEG score recompute
  60. 2026-09-09 01:44 UTCGHSA enrichment
  61. 2026-09-08 22:01 UTCEPSS rescore
  62. 2026-09-08 01:14 UTCEG score recompute
  63. 2026-09-08 01:14 UTCGHSA enrichment
  64. 2026-09-07 00:45 UTCEG score recompute
  65. 2026-09-07 00:45 UTCGHSA enrichment
  66. 2026-09-06 13:48 UTCEPSS rescore
  67. 2026-09-06 00:13 UTCEG score recompute
  68. 2026-09-06 00:13 UTCGHSA enrichment
  69. 2026-09-04 23:41 UTCEG score recompute
  70. 2026-09-04 23:41 UTCGHSA enrichment
  71. 2026-09-04 05:07 UTCEPSS rescore
  72. 2026-09-03 22:14 UTCGHSA enrichment
  73. 2026-09-02 21:20 UTCEG score recompute
  74. 2026-09-02 21:20 UTCGHSA enrichment
  75. 2026-09-02 14:12 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-79769?
CVE-2026-79769 is a medium vulnerability published on August 25, 2026. Nokogiri versions before 1.19.4 contain a possible invalid (out-of-bounds) memory read in the protected internal Node#initializecopywith_args helper behind Node#dup and #clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method…
When was CVE-2026-79769 disclosed?
CVE-2026-79769 was first published on August 25, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79769 actively exploited?
CVE-2026-79769 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79769?
CVE-2026-79769 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-79769?
A fix for CVE-2026-79769 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79769 are linked in the Vendor Advisories panel on this page.

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