Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-32178
This high-severity CVE scores 7.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 82% 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).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 81.3%
- KEV
- Not listed
Published
April 14, 2026
Last Modified
July 15, 2026
Advisory Details (1)
Auto-updated May 7, 2026Security Update Guide - Microsoft Security Response Center
Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32178Vendor Advisories for CVE-2026-32178(13)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- CVE-2026-32178Microsoft Security Response Center (MSRC)High
.NET Spoofing Vulnerability
- RHSA-2026:9205Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:9080Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:9077Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:8474Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 9.0 security update
- RHSA-2026:8471Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 10.0 security update
- RHSA-2026:8473Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 10.0 security update
- RHSA-2026:8475Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 9.0 security update
- +5 more
Patch Availability(19)
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
(12 across 1 ecosystem)
NuGet(12)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| Microsoft.NetCore.App.Runtime.linux-arm | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.linux-arm64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.linux-musl-arm | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.linux-musl-x64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.linux-x64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.osx-arm64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.osx-x64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.win-arm | — | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.win-arm64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.win-x64 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
| Microsoft.NetCore.App.Runtime.win-x86 | 8.0.0 ... 8.0.8 (25 versions) | 8.0.26 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(7)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
- Red HatRHSA-2026:13280IMPORTANT2026-04-14
RHSA-2026:13280 — Important
- Red HatRHSA-2026:13281IMPORTANT2026-04-14
RHSA-2026:13281 — Important
- Red HatRHSA-2026:13282IMPORTANT2026-04-14
RHSA-2026:13282 — Important
- Red HatRHSA-2026:13283IMPORTANT2026-04-14
RHSA-2026:13283 — Important
- Red HatRHSA-2026:13693IMPORTANT2026-04-14
RHSA-2026:13693 — Important
- UbuntuUSN-8176-1MEDIUM
.NET vulnerabilities
- UbuntuUSN-8216-1MEDIUM
.NET vulnerabilities
Data Freshness Timeline
(refreshed 13× in last 7d / 45× 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.
Showing the most recent 100 of 121 total refreshes for this CVE.
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-16 17:03 UTCEPSS rescore
- 2026-07-16 17:03 UTCEPSS rescore
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 02:00 UTCEPSS rescore
- 2026-07-15 02:00 UTCEPSS rescore
- 2026-07-13 22:30 UTCEPSS rescore
- 2026-07-13 06:13 UTCEPSS rescore
- 2026-07-13 06:13 UTCEPSS rescore
- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-11 08:27 UTCEPSS rescore
- 2026-07-09 19:10 UTCEPSS rescore
- 2026-07-08 15:15 UTCEPSS rescore
- 2026-07-07 13:46 UTCEPSS rescore
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- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-29 14:06 UTCEPSS rescore
- 2026-06-29 14:06 UTCEPSS rescore
- 2026-06-28 14:07 UTCEPSS rescore
- 2026-06-28 14:07 UTCEPSS rescore
- 2026-06-28 04:56 UTCEPSS rescore
- 2026-06-28 04:56 UTCEPSS rescore
- 2026-06-27 03:08 UTCEPSS rescore
- 2026-06-25 13:49 UTCEPSS rescore
- 2026-06-25 13:49 UTCEPSS rescore
- 2026-06-24 14:05 UTCEPSS rescore
- 2026-06-23 21:33 UTCEPSS rescore
- 2026-06-23 21:33 UTCEPSS rescore
- 2026-06-22 14:25 UTCEPSS rescore
- 2026-06-22 14:25 UTCEPSS rescore
- 2026-06-21 14:56 UTCEPSS rescore
- 2026-06-21 14:56 UTCEPSS rescore
- 2026-06-21 01:59 UTCEPSS rescore
- 2026-06-19 19:25 UTCEPSS rescore
- 2026-06-19 19:25 UTCEPSS rescore
- 2026-06-18 17:52 UTCEPSS rescore
- 2026-06-18 17:52 UTCEPSS rescore
- 2026-06-17 17:53 UTCEPSS rescore
- 2026-06-16 17:52 UTCEPSS rescore
- 2026-06-15 17:49 UTCEPSS rescore
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-14 21:16 UTCVendor advisory
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-06-12 08:37 UTCVendor advisory
- 2026-06-11 19:18 UTCVendor advisory
- 2026-06-11 14:00 UTCEPSS rescore
- 2026-06-10 22:18 UTCEPSS rescore
- 2026-06-10 13:22 UTCEPSS rescore
- 2026-06-10 13:17 UTCVendor advisory
- 2026-06-10 00:34 UTCVendor advisory
- 2026-06-09 10:42 UTCVendor advisory
- 2026-06-08 14:17 UTCEPSS rescore
- 2026-06-08 14:17 UTCEPSS rescore
- 2026-06-08 07:12 UTCVendor advisory
- 2026-06-07 18:29 UTCVendor advisory
- 2026-06-07 15:25 UTCEPSS rescore
- 2026-06-07 15:25 UTCEPSS rescore
- 2026-06-07 15:25 UTCEPSS rescore
- 2026-06-07 05:40 UTCVendor advisory
- 2026-06-06 13:47 UTCEPSS rescore
- 2026-06-06 13:47 UTCEPSS rescore
- 2026-06-05 22:47 UTCEPSS rescore
- 2026-06-05 22:47 UTCEPSS rescore
- 2026-06-05 06:10 UTCEPSS rescore
- 2026-06-05 06:10 UTCEPSS rescore
- 2026-06-04 13:12 UTCEPSS rescore
- 2026-06-04 13:12 UTCEPSS rescore
- 2026-06-03 21:36 UTCVendor advisory
- 2026-06-02 20:13 UTCEPSS rescore
- 2026-06-02 18:14 UTCVendor advisory
- 2026-06-01 19:48 UTCVendor advisory
- 2026-06-01 13:51 UTCEPSS rescore
- 2026-06-01 13:51 UTCEPSS rescore
- 2026-05-31 22:30 UTCEPSS rescore
- 2026-05-31 22:30 UTCEPSS rescore
- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-29 13:44 UTCEPSS rescore
- 2026-05-29 13:44 UTCEPSS rescore
- 2026-05-28 13:44 UTCEPSS rescore
- 2026-05-28 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2026-32178?
When was CVE-2026-32178 disclosed?
Is CVE-2026-32178 actively exploited?
What is the CVSS score of CVE-2026-32178?
How do I remediate CVE-2026-32178?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-32178
Is Your Infrastructure Affected by CVE-2026-32178?
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