Vulnerability-Lookup

CVE-2026-2336 (GCVE-0-2026-2336)

Vulnerability from cvelistv5 – Published: 2026-04-16 17:02 – Updated: 2026-04-16 17:34

Title

Weak webstax_auth Cookie Authentication Allows Privilege Escalation

Summary

A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstax_auth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-16 17:34 UTC

CWE

CWE-331 - Insufficient entropy

Assigner

Microchip mitre root

References

1 reference

URL	Tags
https://www.microchip.com/en-us/solutions/technol…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Microchip	IStaX	Affected: 0 , < 2026.03 (custom)	guessed

Date Public

2026-04-14 00:00

Credits

Rickard Jonsson

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-2336

Vulnerability from fkie_nvd - Published: 2026-04-16 18:16 - Updated: 2026-08-12 16:19

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	dc3f6da9-85b5-4a73-84a2-2ec90b40fca5	https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication	Broken Link

Impacted products

	Vendor	Product	Version
	microchip	istax	*

JSON

To clipboard

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    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "IStaX",
          "vendor": "Microchip",
          "versions": [
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  "lastModified": "2026-08-12T16:19:46.283",
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}

GHSA-V47P-Q5XC-J34W

Vulnerability from github – Published: 2026-04-16 18:31 – Updated: 2026-08-12 18:30

Details

Severity

8.8 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H

Show details on source website

JSON

To clipboard

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    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-16T18:16:44Z",
    "severity": "HIGH"
  },
  "details": "A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstax_auth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03.",
  "id": "GHSA-v47p-q5xc-j34w",
  "modified": "2026-08-12T18:30:59Z",
  "published": "2026-04-16T18:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2336"
    },
    {
      "type": "WEB",
      "url": "https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-2336 (GCVE-0-2026-2336)

FKIE_CVE-2026-2336

GHSA-V47P-Q5XC-J34W

Tags

Sightings

Nomenclature

Related by attack behaviour