CVE-2026-79772

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-25. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA 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
Severity53% × 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
25th
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 1, 2026

Advisory Details (1)

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

Unchecked return value from xmlC14NExecute · Advisory · sparklemotion/nokogiri · GitHub

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532

Vendor Advisories for CVE-2026-79772(1)

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

Affected Packages

(4 across 4 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, 1.18.10+dfsg-2, 1.18.10+dfsg-3, 1.18.2+dfsg-1
  • every version up to 1.19.1+dfsg-1: fixed in 1.19.1+dfsg-1
—
RubyGems(1)
PackageVulnerable rangeFix by version rangeDependents
nokogiri1.10.0 ... 1.9.1 (155 versions)
  • 1.5.1 up to 1.19.1: fixed in 1.19.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 53× 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. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-09 04:23 UTCEG score recompute
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-08 03:17 UTCEG score recompute
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-07 01:11 UTCEG score recompute
  7. 2026-10-06 15:18 UTCEPSS rescore
  8. 2026-10-06 02:33 UTCEG score recompute
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-05 02:23 UTCEG score recompute
  11. 2026-10-04 23:22 UTCEPSS rescore
  12. 2026-10-04 03:44 UTCEG score recompute
  13. 2026-10-03 14:26 UTCEPSS rescore
  14. 2026-10-03 05:06 UTCEG score recompute
  15. 2026-10-02 17:57 UTCEPSS rescore
  16. 2026-10-02 06:28 UTCEG score recompute
  17. 2026-10-01 19:50 UTCEPSS rescore
  18. 2026-10-01 05:36 UTCEG score recompute
  19. 2026-09-30 06:47 UTCEG score recompute
  20. 2026-09-29 15:24 UTCEPSS rescore
  21. 2026-09-28 21:30 UTCEG score recompute
  22. 2026-09-28 13:52 UTCEPSS rescore
  23. 2026-09-27 20:43 UTCEG score recompute
  24. 2026-09-27 13:48 UTCEPSS rescore
  25. 2026-09-26 22:05 UTCEG score recompute
Show 68 more
  1. 2026-09-26 15:59 UTCEPSS rescore
  2. 2026-09-26 00:28 UTCEPSS rescore
  3. 2026-09-25 10:18 UTCEG score recompute
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 11:40 UTCEG score recompute
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 13:02 UTCEG score recompute
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-22 14:23 UTCEG score recompute
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 15:42 UTCEG score recompute
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-19 18:26 UTCEG score recompute
  14. 2026-09-18 19:47 UTCEG score recompute
  15. 2026-09-18 19:28 UTCEPSS rescore
  16. 2026-09-17 21:09 UTCEG score recompute
  17. 2026-09-16 19:23 UTCEG score recompute
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-15 18:55 UTCEG score recompute
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-13 21:38 UTCEG score recompute
  24. 2026-09-12 23:00 UTCEG score recompute
  25. 2026-09-12 00:21 UTCEG score recompute
  26. 2026-09-11 14:53 UTCEPSS rescore
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 01:43 UTCEG score recompute
  29. 2026-09-09 04:25 UTCEG score recompute
  30. 2026-09-08 22:01 UTCEPSS rescore
  31. 2026-09-08 05:47 UTCEG score recompute
  32. 2026-09-07 07:08 UTCEG score recompute
  33. 2026-09-06 13:48 UTCEPSS rescore
  34. 2026-09-06 08:28 UTCEG score recompute
  35. 2026-09-05 09:50 UTCEG score recompute
  36. 2026-09-04 11:12 UTCEG score recompute
  37. 2026-09-04 05:07 UTCEPSS rescore
  38. 2026-09-03 12:34 UTCEG score recompute
  39. 2026-09-02 14:12 UTCEPSS rescore
  40. 2026-09-02 13:54 UTCGHSA enrichment
  41. 2026-09-01 15:04 UTCEG score recompute
  42. 2026-09-01 15:04 UTCGHSA enrichment
  43. 2026-09-01 13:54 UTCEPSS rescore
  44. 2026-09-01 04:40 UTCEPSS rescore
  45. 2026-09-01 04:40 UTCEPSS rescore
  46. 2026-08-31 19:36 UTCGHSA enrichment
  47. 2026-08-30 20:44 UTCEG score recompute
  48. 2026-08-30 20:44 UTCGHSA enrichment
  49. 2026-08-30 19:18 UTCEPSS rescore
  50. 2026-08-30 19:17 UTCEPSS rescore
  51. 2026-08-30 01:22 UTCEPSS rescore
  52. 2026-08-29 22:06 UTCGHSA enrichment
  53. 2026-08-28 23:28 UTCEG score recompute
  54. 2026-08-28 23:28 UTCGHSA enrichment
  55. 2026-08-28 22:51 UTCEG score recompute
  56. 2026-08-28 22:51 UTCGHSA enrichment
  57. 2026-08-28 21:42 UTCEPSS rescore
  58. 2026-08-28 19:07 UTCGHSA enrichment
  59. 2026-08-28 12:24 UTCEG score recompute
  60. 2026-08-28 12:24 UTCGHSA enrichment
  61. 2026-08-27 14:25 UTCEPSS rescore
  62. 2026-08-27 13:45 UTCGHSA enrichment
  63. 2026-08-26 15:06 UTCEG score recompute
  64. 2026-08-26 15:06 UTCGHSA enrichment
  65. 2026-08-26 14:47 UTCEPSS rescore
  66. 2026-08-25 16:24 UTCEG score recompute
  67. 2026-08-25 15:30 UTCEG score recompute
  68. 2026-08-25 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-79772?
CVE-2026-79772 is a medium vulnerability published on August 25, 2026. Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid…
When was CVE-2026-79772 disclosed?
CVE-2026-79772 was first published on August 25, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79772 actively exploited?
CVE-2026-79772 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79772?
CVE-2026-79772 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-79772?
A fix for CVE-2026-79772 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79772 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79772

Explore →

Is Your Infrastructure Affected by CVE-2026-79772?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs