CVE-2022-29181

HIGHNVD 8.28.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 3.2% (88th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 3.2%CVSS: 8.2Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Nokogiri is an open source XML and HTML library for Ruby. Nokogiri prior to version 1.13.6 does not type-check all inputs into the XML and HTML4 SAX parsers, allowing specially crafted untrusted inputs to cause illegal memory access errors (segfault) or reads from unrelated memory. Version 1.13.6 contains a patch for this issue. As a workaround, ensure the untrusted input is a String by calling #to_s or equivalent.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
68
EG Risk 68/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
3.2%
EPSS %ILE
88th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
3.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-20). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 20, 2022

Last Modified

May 27, 2025

Advisory Details (7)

Auto-updated Sep 7, 2026
Patch available. Sources: github_commit, github_release, github.
Web page

Nokogiri: Multiple Vulnerabilities (GLSA 202208-29) — Gentoo security

https://security.gentoo.org/glsa/202208-29
GitHub advisoryMentions a patch (unverified)

Improper Handling of Unexpected Data Type in Nokogiri · Advisory · sparklemotion/nokogiri · GitHub

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-xh29-r2w5-wx8m
GitHub release Patch Available

1.13.6 / 2022-05-08

Patch available: sparklemotion/nokogiri v1.13.6

https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.6
GitHub commit Patch Available

commit db05ba9a1bd4 (sparklemotion/nokogiri)

Patch available: sparklemotion/nokogiri v1.16.1 (contains commit db05ba9a1bd4)

https://github.com/sparklemotion/nokogiri/commit/db05ba9a1bd4b90aa6c76742cf6102a7c7297267
Web page

Full Disclosure: APPLE-SA-2022-12-13-4 macOS Ventura 13.1

http://seclists.org/fulldisclosure/2022/Dec/23
GitHub advisory

GHSL-2022-031_GHSL-2022-032: Type confusion in Nokogiri leads to memory leak or DoS - CVE-2022-29181 | GitHub Security Lab

https://securitylab.github.com/advisories/GHSL-2022-031_GHSL-2022-032_Nokogiri
GitHub commit

commit 83cc451c3f29 (sparklemotion/nokogiri)

Fix landed in sparklemotion/nokogiri commit 83cc451c3f29 — awaiting tagged release

https://github.com/sparklemotion/nokogiri/commit/83cc451c3f29df397caa890afc3b714eae6ab8f7

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubunturuby-nokogiri (1.13.1+dfsg-2ubuntu0.1~esm1) @ jammy2026-10-21ubuntu
redhattfm-rubygem-nokogiri-0:1.13.8-1.el8sat2022-11-16redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri1.11.1+dfsg-2 ... 1.19.4+dfsg-1 (33 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri—
  • every version up to 1.13.7+dfsg-1: fixed in 1.13.7+dfsg-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri—
  • every version up to 1.13.7+dfsg-1: fixed in 1.13.7+dfsg-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-nokogiri—
  • every version up to 1.13.7+dfsg-1: fixed in 1.13.7+dfsg-1
—
RubyGems(1)
PackageVulnerable rangeFix by version rangeDependents
nokogiri1.0.0 ... 1.9.1 (145 versions)
  • every version up to 1.13.6: fixed in 1.13.6
—

Weakness Classification(2)

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

All Vendor Advisories

(2)

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 10× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 196 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 100 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  2. 2026-10-22 16:30 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  3. 2026-10-21 16:28 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  4. 2026-10-21 07:29 UTCEG score recompute
  5. 2026-10-21 07:29 UTCVendor advisory
  6. 2026-10-20 16:29 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  7. 2026-10-19 16:28 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  8. 2026-10-18 16:28 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  9. 2026-10-18 08:37 UTCEG score recompute
  10. 2026-10-17 16:29 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  11. 2026-10-16 16:34 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  12. 2026-10-16 16:25 UTCOSV refresh
  13. 2026-10-15 16:28 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  14. 2026-10-14 16:29 UTCEPSS rescoreEPSS 3.2% · 88th percentile
  15. 2026-10-13 16:29 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  16. 2026-10-12 18:55 UTCEG score recompute
  17. 2026-10-12 16:30 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  18. 2026-10-11 23:20 UTCEG score recompute
  19. 2026-10-11 13:44 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  20. 2026-10-10 19:56 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  21. 2026-10-09 20:04 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  22. 2026-10-08 16:40 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  23. 2026-10-07 23:45 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  24. 2026-10-06 15:14 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  25. 2026-10-05 17:40 UTCEPSS rescoreEPSS 3.2% · 87th percentile
Show 71 more
  1. 2026-10-04 23:19 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  2. 2026-10-03 14:23 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  3. 2026-10-02 16:23 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  4. 2026-09-30 15:54 UTCEG score recompute
  5. 2026-09-30 15:00 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  6. 2026-09-29 15:16 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  7. 2026-09-28 13:48 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  8. 2026-09-27 13:42 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  9. 2026-09-26 15:54 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  10. 2026-09-26 00:22 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  11. 2026-09-24 21:46 UTCOSV refresh
  12. 2026-09-24 14:00 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  13. 2026-09-23 13:45 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  14. 2026-09-22 14:44 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  15. 2026-09-20 20:13 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  16. 2026-09-19 15:38 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  17. 2026-09-18 19:24 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  18. 2026-09-16 14:05 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  19. 2026-09-15 03:06 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  20. 2026-09-12 14:57 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  21. 2026-09-11 14:49 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  22. 2026-09-11 09:33 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  23. 2026-09-08 21:57 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  24. 2026-09-07 15:58 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  25. 2026-09-06 13:45 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  26. 2026-09-05 15:25 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  27. 2026-09-05 13:55 UTCOSV refresh
  28. 2026-09-04 13:57 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  29. 2026-09-04 05:04 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  30. 2026-09-02 14:09 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  31. 2026-09-01 13:51 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  32. 2026-08-30 19:14 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  33. 2026-08-30 01:19 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  34. 2026-08-28 21:38 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  35. 2026-08-27 14:22 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  36. 2026-08-26 14:43 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  37. 2026-08-25 13:46 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  38. 2026-08-24 14:13 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  39. 2026-08-23 00:16 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  40. 2026-08-21 23:46 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  41. 2026-08-20 22:52 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  42. 2026-08-19 17:01 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  43. 2026-08-19 00:29 UTCOSV refresh
  44. 2026-08-18 13:45 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  45. 2026-08-17 13:44 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  46. 2026-08-16 14:53 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  47. 2026-08-16 02:11 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  48. 2026-08-15 01:27 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  49. 2026-08-13 21:57 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  50. 2026-08-12 13:48 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  51. 2026-08-11 13:38 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  52. 2026-08-08 16:34 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  53. 2026-08-07 16:24 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  54. 2026-08-06 13:44 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  55. 2026-08-05 19:15 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  56. 2026-08-04 15:07 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  57. 2026-08-04 10:35 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  58. 2026-08-03 20:27 UTCOSV refresh
  59. 2026-08-03 10:33 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  60. 2026-08-02 02:24 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  61. 2026-08-01 04:13 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  62. 2026-07-30 16:25 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  63. 2026-07-30 01:28 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  64. 2026-07-28 15:33 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  65. 2026-07-26 14:52 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  66. 2026-07-25 14:15 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  67. 2026-07-24 14:15 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  68. 2026-07-23 14:16 UTCEPSS rescoreEPSS 3.1% · 86th percentile
  69. 2026-07-23 02:10 UTCEG score recompute
  70. 2026-07-22 22:57 UTCEG score recompute
  71. 2026-07-22 14:06 UTCEPSS rescoreEPSS 3.1% · 86th percentile

Frequently asked(5)

What is CVE-2022-29181?
CVE-2022-29181 is a high-severity vulnerability; its CVE record was published on May 20, 2022. Nokogiri is an open source XML and HTML library for Ruby. Nokogiri prior to version 1.13.6 does not type-check all inputs into the XML and HTML4 SAX parsers, allowing specially crafted untrusted inputs to cause illegal memory access errors (segfault) or reads from unrelated memory. Version 1.13.6…
When was the CVE record for CVE-2022-29181 published?
The CVE record for CVE-2022-29181 was published on May 20, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 27, 2025; the record at its source may have been updated since.
Is CVE-2022-29181 actively exploited?
CVE-2022-29181 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.2% probability of exploitation in the next 30 days (88th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-29181?
CVE-2022-29181 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2022-29181?
A fix for CVE-2022-29181 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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