Vulnerability-Lookup

RHSA-2026:77004

Vulnerability from csaf_redhat - Published: 2026-10-06 17:50 - Updated: 2026-10-23 04:33

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: dotnet8.0: * aspnetcore-runtime-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * aspnetcore-runtime-dbg-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * aspnetcore-targeting-pack-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-apphost-pack-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-hostfxr-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-runtime-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-runtime-dbg-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-sdk-8.0-8.0.131-0.1.hum1 (aarch64, x86_64) * dotnet-sdk-8.0-source-built-artifacts-8.0.131-0.1.hum1 (aarch64, x86_64) * dotnet-sdk-dbg-8.0-8.0.131-0.1.hum1 (aarch64, x86_64) * dotnet-targeting-pack-8.0-8.0.31-0.1.hum1 (aarch64, x86_64) * dotnet-templates-8.0-8.0.131-0.1.hum1 (aarch64, x86_64) * dotnet8.0-8.0.131-0.1.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-58649

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

6.5 (Medium)


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

CWE-346 - Origin Validation Error

Affected products

Fixed 9 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-8.0-0:8.0.131-0.1.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-8.0-0:8.0.131-0.1.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-8.0-source-built-artifacts-0:8.0.131-0.1.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-8.0-source-built-artifacts-0:8.0.131-0.1.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-dbg-8.0-0:8.0.131-0.1.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-sdk-dbg-8.0-0:8.0.131-0.1.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-templates-8.0-0:8.0.131-0.1.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-templates-8.0-0:8.0.131-0.1.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dotnet8.0-0:8.0.131-0.1.hum1@src	—	Vendor Fix fix Workaround

Known not affected 16 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:aspnetcore-runtime-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:aspnetcore-runtime-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:aspnetcore-runtime-dbg-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:aspnetcore-runtime-dbg-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:aspnetcore-targeting-pack-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:aspnetcore-targeting-pack-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-apphost-pack-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-apphost-pack-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-hostfxr-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-hostfxr-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-runtime-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-runtime-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-runtime-dbg-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-runtime-dbg-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-targeting-pack-8.0-0:8.0.31-0.1.hum1@aarch64	—	Workaround
Unresolved product id: Red Hat Hardened Images:dotnet-targeting-pack-8.0-0:8.0.31-0.1.hum1@x86_64	—	Workaround

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:77004	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-58649	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-58649	self
https://bugzilla.redhat.com/show_bug.cgi?id=2528870	external
https://www.cve.org/CVERecord?id=CVE-2026-58649	external
https://nvd.nist.gov/vuln/detail/CVE-2026-58649	external

JSON

To clipboard

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          "category": "description",
          "text": "Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.",
          "title": "Vulnerability description"
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          "text": "dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability",
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          "text": "A moderate information disclosure vulnerability was found in the .NET SDK, where the `dotnet watch` BrowserRefreshServer does not adequately validate the origin of cross-origin WebSocket connections. A remote, unauthenticated attacker who tricks a user into interacting with attacker-controlled web content can connect to the browser-refresh WebSocket used during development and retrieve compiled intermediate language (IL) assemblies and program database (PDB) debug files from the development environment, exposing information that should remain confidential. Red Hat rates this issue as moderate severity (CVSS 3.1 score 6.5, AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N), matching the upstream severity. Red Hat Enterprise Linux 8, 9, and 10, Red Hat In-Vehicle OS 2, and Red Hat hardened images that ship the affected .NET SDK (dotnet8.0, dotnet9.0, dotnet10.0) are affected, and fixes are being pursued for these components.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability"
    }
  ]
}

CVE-2026-58649 (GCVE-0-2026-58649)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:17 – Updated: 2026-10-14 23:13

Title

.NET Information Disclosure Vulnerability

Summary

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

Severity

6.5 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 19:45 UTC

CWE

CWE-346 - Origin Validation Error

Assigner

microsoft CNA under the mitre root

CNA scorecard B 82/100 over 3954 records in the last 180 days details

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

6 products

Vendor	Product	Version
Microsoft	.NET 10.0	Affected: 10.0.0 , < 10.0.111, 10.0.400 (custom)
Microsoft	.NET 11.0	Affected: 11.0.0 , < 11.0 RC1 (custom)
Microsoft	.NET 8.0	Affected: 8.0.0 , < 8.0.130, 8.0.424 (custom)
Microsoft	.NET 9.0	Affected: 9.0.0 , < 9.0.120, 9.0.317 (custom)
Microsoft	Microsoft Visual Studio 2022 version 17.14	Affected: 17.14.0 , < 17.14.40 (custom)
Microsoft	Microsoft Visual Studio 2026 version 18.9	Affected: 18.9.0 , < 18.9.3 (custom)

Date Public

2026-09-08 14:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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