Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.3.0 until 1.22.0, onnx.version_converter.convert_version() can perform an out-of-bounds read in Gemm_7_6::adapt_gemm_7_6() in onnx/version_converter/adapters/gemm_7_6.h when a Gemm node has input tensors with fewer than two dimensions because B_shape[1], A_shape[0], or A_shape[1] is accessed without a rank check, potentially causing a process crash during an opset 7 to 6 downgrade. This issue is fixed in version 1.22.0.
CVE-2026-63632
LOWPre-NVD 3.33.3—Elevated
EchelonGraph scoreMEDIUM confidence
This low-severity CVE scores 3.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
3.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.3Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 3.3
- EG Score
- 3.3(medium)
- EG Risk
- 31(Track)EG Risk 31/100SSVC: Track
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 computedSeverity33% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 6%
- KEV
- Not listed
Published
July 24, 2026
Last Modified
August 18, 2026
References (5)
- security-advisories@githubhttps://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66
- security-advisories@githubhttps://github.com/onnx/onnx/pull/7880
- security-advisories@githubhttps://github.com/onnx/onnx/releases/tag/v1.22.0
- security-advisories@githubhttps://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9
Vendor Advisories for CVE-2026-63632(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| onnx | 1.10.0 ... 1.9.0 (39 versions) | 1.22.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 11× 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.
- 2026-08-26 14:46 UTCEPSS rescore
- 2026-08-25 13:49 UTCEPSS rescore
- 2026-08-24 18:05 UTCEG score recompute
- 2026-08-21 23:49 UTCEPSS rescore
- 2026-08-21 18:38 UTCEG score recompute
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-19 17:04 UTCEPSS rescore
- 2026-08-18 19:25 UTCEG score recompute
- 2026-08-18 19:06 UTCEG score recompute
- 2026-08-18 15:34 UTCEG score recompute
- 2026-07-30 14:41 UTCEG score recompute
- 2026-07-27 15:24 UTCEG score recompute
- 2026-07-24 16:12 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-63632?
CVE-2026-63632 is a low vulnerability published on July 24, 2026. Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.3.0 until 1.22.0, onnx.versionconverter.convertversion() can perform an out-of-bounds read in Gemm76::adaptgemm76() in onnx/versionconverter/adapters/gemm76.h when a Gemm node has input tensors…
When was CVE-2026-63632 disclosed?
CVE-2026-63632 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63632 actively exploited?
CVE-2026-63632 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.3% of all scored CVEs.
What is the CVSS score of CVE-2026-63632?
CVE-2026-63632 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2026-63632?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63632, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-63632
Is Your Infrastructure Affected by CVE-2026-63632?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.