CVE-2020-8441

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.0%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

JYaml through 1.3 allows remote code execution during deserialization of a malicious payload through the load() function. NOTE: this is a discontinued product.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
51
EG Risk 51/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fixed version is listed under Patch Availability. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
5.0%
EPSS %ILE
91st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fixed version is listed under Patch Availability. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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

Published

February 19, 2020

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Oct 4, 2026
Fixed version listed under Patch Availability.
generic

JYaml / Bugs

https://sourceforge.net/p/jyaml/bugs/
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20200313-0001/
generic

marshalsec/marshalsec.pdf at master · mbechler/marshalsec · GitHub

https://github.com/mbechler/marshalsec/blob/master/marshalsec.pdf
generic

GitHub - mbechler/marshalsec · GitHub

https://github.com/mbechler/marshalsec
generic

jyaml Java library - 1.3 Deserialization attack · GitHub

https://gist.github.com/j0lt-github/f5141abcacae63d434ecae211422153a

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
mavenorg.jyaml:jyaml—ghsa

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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.jyaml:jyaml1.2, 1.3
  • every version through 1.3: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 26× 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 85 of 148 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. 15 repeat rows among the latest 100 are merged into the row they repeat. The 63 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  2. 2026-10-10 19:56 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  3. 2026-10-09 20:04 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  4. 2026-10-08 16:39 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  5. 2026-10-07 23:44 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  6. 2026-10-06 15:13 UTCEPSS rescoreEPSS 5.0% · 91st percentile
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  8. 2026-10-04 23:18 UTCEPSS rescoreEPSS 5.0% · 91st percentile
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  10. 2026-10-02 16:22 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  11. 2026-10-01 19:46 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  12. 2026-09-30 15:24 UTCEG score recompute
  13. 2026-09-30 14:59 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  14. 2026-09-27 13:41 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  15. 2026-09-26 15:54 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  16. 2026-09-26 00:21 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  17. 2026-09-24 14:00 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  18. 2026-09-22 14:44 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  19. 2026-09-21 20:28 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  20. 2026-09-19 15:37 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  21. 2026-09-18 19:23 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  22. 2026-09-17 19:22 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  23. 2026-09-16 14:04 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  24. 2026-09-15 03:06 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  25. 2026-09-13 16:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
Show 60 more
  1. 2026-09-12 14:57 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  2. 2026-09-08 21:56 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  3. 2026-09-07 15:58 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  4. 2026-09-06 13:44 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  5. 2026-09-05 15:25 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  6. 2026-09-04 13:57 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  7. 2026-09-04 05:03 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  8. 2026-09-02 14:08 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  9. 2026-09-01 03:32 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  10. 2026-08-30 19:14 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  11. 2026-08-30 01:19 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  12. 2026-08-28 21:37 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  13. 2026-08-27 14:21 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  14. 2026-08-26 14:42 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  15. 2026-08-21 23:45 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  16. 2026-08-19 17:00 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  17. 2026-08-18 13:44 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  18. 2026-08-17 13:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  19. 2026-08-16 14:52 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  20. 2026-08-16 02:11 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  21. 2026-08-15 01:27 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  22. 2026-08-13 21:57 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  23. 2026-08-12 13:47 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  24. 2026-08-09 13:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  25. 2026-08-08 16:33 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  26. 2026-08-07 16:23 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  27. 2026-08-06 13:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  28. 2026-08-05 19:14 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  29. 2026-08-04 15:06 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  30. 2026-08-04 10:34 UTCEPSS rescoreEPSS 5.0% · 91st percentile
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  34. 2026-07-30 01:27 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  35. 2026-07-28 15:33 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  36. 2026-07-25 14:15 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  37. 2026-07-24 14:15 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  38. 2026-07-23 14:15 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  39. 2026-07-23 01:55 UTCEG score recompute
  40. 2026-07-22 22:41 UTCEG score recompute
  41. 2026-07-22 14:05 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  42. 2026-07-21 15:22 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  43. 2026-07-20 17:04 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  44. 2026-07-19 14:28 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  45. 2026-07-19 02:26 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  46. 2026-07-18 10:02 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  47. 2026-07-16 17:00 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  48. 2026-07-15 16:55 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  49. 2026-07-15 01:57 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  50. 2026-07-13 22:27 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  51. 2026-07-12 05:44 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  52. 2026-07-11 08:25 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  53. 2026-07-09 19:07 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  54. 2026-07-08 15:12 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  55. 2026-07-07 13:43 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  56. 2026-07-06 16:25 UTCEPSS rescoreEPSS 5.0% · 91st percentile
  57. 2026-07-06 02:21 UTCEPSS rescoreEPSS 4.8% · 90th percentile
  58. 2026-07-05 02:28 UTCEPSS rescoreEPSS 4.8% · 90th percentile
  59. 2026-07-04 06:29 UTCEPSS rescoreEPSS 4.8% · 90th percentile
  60. 2026-07-02 16:57 UTCEPSS rescoreEPSS 4.8% · 90th percentile

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Frequently asked(5)

What is CVE-2020-8441?
CVE-2020-8441 is a critical-severity vulnerability; its CVE record was published on February 19, 2020. JYaml through 1.3 allows remote code execution during deserialization of a malicious payload through the load() function. NOTE: this is a discontinued product.
When was the CVE record for CVE-2020-8441 published?
The CVE record for CVE-2020-8441 was published on February 19, 2020. 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 November 21, 2024; the record at its source may have been updated since.
Is CVE-2020-8441 actively exploited?
CVE-2020-8441 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.0% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-8441?
CVE-2020-8441 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-8441?
A fixed version for CVE-2020-8441 is listed under Patch Availability on this page: update to the version listed for your package.

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