CVE-2026-58649

HIGH

6.5

CVSS v3

NVD

Description

Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.

CWE-346

How to fix

Remediation Available

aspnetcore-runtime-10.0Red Hat / RHEL

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-runtime-10.0Rocky

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-runtime-8.0Red Hat / RHEL

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-runtime-8.0Rocky

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-runtime-9.0Red Hat / RHEL

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

aspnetcore-runtime-9.0Rocky

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

aspnetcore-runtime-dbg-10.0Rocky

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-runtime-dbg-10.0Red Hat / RHEL

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-runtime-dbg-8.0Red Hat / RHEL

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-runtime-dbg-8.0Rocky

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-runtime-dbg-9.0Red Hat / RHEL

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

aspnetcore-runtime-dbg-9.0Rocky

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

aspnetcore-targeting-pack-10.0Red Hat / RHEL

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-targeting-pack-10.0Rocky

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

aspnetcore-targeting-pack-8.0Red Hat / RHEL

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-targeting-pack-8.0Rocky

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

aspnetcore-targeting-pack-9.0Rocky

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

aspnetcore-targeting-pack-9.0Red Hat / RHEL

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

dotnet-apphost-pack-10.0Red Hat / RHEL

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

dotnet-apphost-pack-10.0Rocky

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

dotnet-apphost-pack-10.0-debuginfoRocky

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

dotnet-apphost-pack-10.0-debuginfoRed Hat / RHEL

Fixed in:0:10.0.12-1.el10_2RHSA-2026:67530

Fixed in:0:10.0.12-1.el9_8RHSA-2026:67613

dotnet-apphost-pack-8.0Rocky

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

dotnet-apphost-pack-8.0Red Hat / RHEL

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

dotnet-apphost-pack-8.0-debuginfoRocky

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

dotnet-apphost-pack-8.0-debuginfoRed Hat / RHEL

Fixed in:0:8.0.31-1.el10_2RHSA-2026:67525

Fixed in:0:8.0.31-1.el9_8RHSA-2026:67524

dotnet-apphost-pack-9.0Red Hat / RHEL

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

dotnet-apphost-pack-9.0Rocky

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

dotnet-apphost-pack-9.0-debuginfoRed Hat / RHEL

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

dotnet-apphost-pack-9.0-debuginfoRocky

Fixed in:0:9.0.20-1.el10_2RHSA-2026:67528

Fixed in:0:9.0.20-1.el9_8RHSA-2026:67614

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Exploit Intelligence

0.27%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Other references1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-34291	High	8.8	84%	KEV	-
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2015-4495	High	8.8	71%	KEV	Fix
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2024-23898	High	8.8	67%	-	Fix

Common questions

How do I fix CVE-2026-58649?

Published advisories record a fix for 142 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-58649 being actively exploited?

Not that we know of. CVE-2026-58649 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.27% is the estimated probability that it will be exploited in the next 30 days. That is higher than 20% of all scored CVEs.

How severe is CVE-2026-58649?

CVE-2026-58649 has a CVSS v3 base score of 6.5, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-58649 affect?

Published advisories record a fix for aspnetcore-runtime-10.0 (Red Hat / RHEL), aspnetcore-runtime-10.0 (Rocky), aspnetcore-runtime-8.0 (Red Hat / RHEL), aspnetcore-runtime-8.0 (Rocky), and 138 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-08.