CVE-2026-34445

HIGHNVD 8.68.6
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.5% (42nd 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 week
8.6EG
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: 0.5%CVSS: 8.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Python’s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn’t check if the "keys" in the file were valid. Due to this, an attacker could craft a malicious model that overwrites internal object properties. This issue has been patched in version 1.21.0.

CVSS v3
8.6
EG Score
8.6HIGHmedium confidence
EG Risk
54
EG Risk 54/100

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)
Severity86% × 45%
Impact severity (EG Severity): CVSS 8.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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
0.5%
EPSS %ILE
42nd
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 (8.6): severity, escalated by confirmed exploitation. This CVE's 8.6 is its impact severity (EG Severity), not escalated.

EG Severity
8.6 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
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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 none (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

April 1, 2026

Last Modified

April 15, 2026

Advisory Details (3)

Auto-updated Jun 9, 2026
Patch available. Sources: github_commit, github_pr, github.
GitHub advisoryMentions a patch (unverified)

Malicious ONNX models can crash servers by exploiting unprotected object settings. · Advisory · onnx/onnx · GitHub

https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9
GitHub pull request

Merged Fix object state corruption and DoS via ExternalDataInfo attribute injection

Fix merged in onnx/onnx PR #7751 on 2026-03-18 — awaiting tagged release

https://github.com/onnx/onnx/pull/7751
GitHub commit

commit e30c6935d67c (onnx/onnx)

Fix landed in onnx/onnx commit e30c6935d67c — awaiting tagged release

https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17902609542026-09-30redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17881858992026-09-08redhat

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
onnx1.12.0-1 ... 1.7.0+dfsg-3.1 (24 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
onnx1.12.0-2 ... 1.21.0-1 (21 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
onnx1.17.0-3 ... 1.21.0-1 (9 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
onnx1.17.0-3 ... 1.21.0-1 (9 versions)
  • every version on: no fix on record
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
onnx0.1 ... 1.9.0 (47 versions)
  • every version up to 1.21.0: fixed in 1.21.0
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 35× 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 98 of 221 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 123 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-18 03:45 UTCEG score recompute
  8. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-10-17 15:34 UTCEG score recompute
  10. 2026-10-17 15:34 UTCVendor advisory
  11. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-12 16:12 UTCEG score recompute
  17. 2026-10-11 19:54 UTCEG score recompute
  18. 2026-10-11 17:08 UTCEG score recompute
  19. 2026-10-11 14:35 UTCEG score recompute
  20. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-11 02:31 UTCOSV refresh
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 73 more
  1. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-09-21 14:19 UTCOSV refresh
  12. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  27. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  28. 2026-09-02 11:44 UTCOSV refresh
  29. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  30. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  31. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  32. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  33. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  34. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  35. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  37. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  38. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  41. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  42. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  43. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-08-16 09:29 UTCEG score recompute
  45. 2026-08-16 09:29 UTCVendor advisory
  46. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  47. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-08-14 19:02 UTCVendor advisory
  49. 2026-08-14 05:55 UTCEG score recompute
  50. 2026-08-14 05:55 UTCVendor advisory
  51. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  52. 2026-08-13 10:06 UTCVendor advisory
  53. 2026-08-12 20:11 UTCEG score recompute
  54. 2026-08-12 20:11 UTCVendor advisory
  55. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  56. 2026-08-11 20:33 UTCEG score recompute
  57. 2026-08-11 20:33 UTCVendor advisory
  58. 2026-08-11 03:33 UTCEG score recompute
  59. 2026-08-11 03:33 UTCVendor advisory
  60. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  61. 2026-08-09 18:11 UTCEG score recompute
  62. 2026-08-09 18:11 UTCVendor advisory
  63. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  64. 2026-08-09 05:28 UTCEG score recompute
  65. 2026-08-09 05:28 UTCVendor advisory
  66. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  67. 2026-08-08 04:17 UTCEG score recompute
  68. 2026-08-07 15:34 UTCVendor advisory
  69. 2026-08-06 18:04 UTCEG score recompute
  70. 2026-08-06 18:04 UTCVendor advisory
  71. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  72. 2026-08-06 00:28 UTCEG score recompute
  73. 2026-08-06 00:28 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-34445?
CVE-2026-34445 is a high-severity vulnerability; its CVE record was published on April 1, 2026. Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Python’s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn’t check if…
When was the CVE record for CVE-2026-34445 published?
The CVE record for CVE-2026-34445 was published on April 1, 2026. 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 April 15, 2026; the record at its source may have been updated since.
Is CVE-2026-34445 actively exploited?
CVE-2026-34445 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34445?
CVE-2026-34445 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-34445?
A fix for CVE-2026-34445 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-34445 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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