Vulnerability-Lookup

CNVD-2026-35007

Vulnerability from cnvd - Published: 2026-09-03

Title

Siemens kas加密问题漏洞

Description

Siemens kas是德国Siemens公司的一款工业控制领域的集成化平台。 Siemens kas存在加密问题漏洞，该漏洞源于仅依赖git提交ID验证仓库完整性，用户可能被诱骗检出同名恶意分支，攻击者可利用该漏洞导致检出被篡改的代码。

Severity

中

Patch Name

Siemens kas加密问题漏洞的补丁

Patch Description

Siemens kas是德国Siemens公司的一款工业控制领域的集成化平台。 Siemens kas存在加密问题漏洞，该漏洞源于仅依赖git提交ID验证仓库完整性，用户可能被诱骗检出同名恶意分支，攻击者可利用该漏洞导致检出被篡改的代码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： https://github.com/siemens/kas/security/advisories/GHSA-qjwp-hrq6-r26r

Reference

https://nvd.nist.gov/vuln/detail/cve-2026-47191

Impacted products

Name
SIEMENS kas <5.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-47191",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-47191"
    }
  },
  "description": "Siemens kas\u662f\u5fb7\u56fdSiemens\u516c\u53f8\u7684\u4e00\u6b3e\u5de5\u4e1a\u63a7\u5236\u9886\u57df\u7684\u96c6\u6210\u5316\u5e73\u53f0\u3002\n\nSiemens kas\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ec5\u4f9d\u8d56git\u63d0\u4ea4ID\u9a8c\u8bc1\u4ed3\u5e93\u5b8c\u6574\u6027\uff0c\u7528\u6237\u53ef\u80fd\u88ab\u8bf1\u9a97\u68c0\u51fa\u540c\u540d\u6076\u610f\u5206\u652f\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u68c0\u51fa\u88ab\u7be1\u6539\u7684\u4ee3\u7801\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://github.com/siemens/kas/security/advisories/GHSA-qjwp-hrq6-r26r",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-35007",
  "openTime": "2026-09-03",
  "patchDescription": "Siemens kas\u662f\u5fb7\u56fdSiemens\u516c\u53f8\u7684\u4e00\u6b3e\u5de5\u4e1a\u63a7\u5236\u9886\u57df\u7684\u96c6\u6210\u5316\u5e73\u53f0\u3002\r\n\r\nSiemens kas\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ec5\u4f9d\u8d56git\u63d0\u4ea4ID\u9a8c\u8bc1\u4ed3\u5e93\u5b8c\u6574\u6027\uff0c\u7528\u6237\u53ef\u80fd\u88ab\u8bf1\u9a97\u68c0\u51fa\u540c\u540d\u6076\u610f\u5206\u652f\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u68c0\u51fa\u88ab\u7be1\u6539\u7684\u4ee3\u7801\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Siemens kas\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "SIEMENS kas \u003c5.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/cve-2026-47191",
  "serverity": "\u4e2d",
  "submitTime": "2026-09-02",
  "title": "Siemens kas\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2026-47191 (GCVE-0-2026-47191)

Vulnerability from cvelistv5 – Published: 2026-08-14 16:35 – Updated: 2026-08-18 02:10

Title

kas checks out SHA-like git branches as valid commits

Summary

kas is a setup tool for bitbake based projects. Prior to version 5.3, when relying solely on a git commit ID (SHA-1 or SHA-256) to qualify if a checkout of a repository is equivalent to the state validated while adding its commit ID to a kas configuration, users may be tricked to check out a branch of the same name from this repository. This implies that the referenced repository has been taken over by an attacker and modified to carry such a branch. SHA-1 commits may also be replaced by creating hash collisions, so the primary impact of this issue is on SHA-256 commit IDs. Version 5.3 fixes the issue. As a workaround, avoid relying solely on the commit ID for integrity validation of a repository that might become under control of a malicious 3rd party. If available, additional validate cryptographically signed commits or tags. Alternatively, mirror the repository to a save place, validate its integrity, and use this instead of the original one.

Severity

2.1 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 02:10 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/siemens/kas/security/advisorie…	x_refsource_CONFIRM
https://github.com/siemens/kas/commit/4cb4a3d0112…	x_refsource_MISC
https://github.com/pypa/advisory-database/tree/ma…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
siemens	kas	Affected: < 5.3

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47191",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T02:10:17.022365Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T02:10:29.632Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kas",
          "vendor": "siemens",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "kas is a setup tool for bitbake based projects. Prior to version 5.3, when relying solely on a git commit ID (SHA-1 or SHA-256) to qualify if a checkout of a repository is equivalent to the state validated while adding its commit ID to a kas configuration, users may be tricked to check out a branch of the same name from this repository. This implies that the referenced repository has been taken over by an attacker and modified to carry such a branch. SHA-1 commits may also be replaced by creating hash collisions, so the primary impact of this issue is on SHA-256 commit IDs. Version 5.3 fixes the issue. As a workaround, avoid relying solely on the commit ID for integrity validation of a repository that might become under control of a malicious 3rd party. If available, additional validate cryptographically signed commits or tags. Alternatively, mirror the repository to a save place, validate its integrity, and use this instead of the original one."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-14T16:35:48.128Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/siemens/kas/security/advisories/GHSA-qjwp-hrq6-r26r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/siemens/kas/security/advisories/GHSA-qjwp-hrq6-r26r"
        },
        {
          "name": "https://github.com/siemens/kas/commit/4cb4a3d01122ffaec9feaae768a5814092f6f9b5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/siemens/kas/commit/4cb4a3d01122ffaec9feaae768a5814092f6f9b5"
        },
        {
          "name": "https://github.com/pypa/advisory-database/tree/main/vulns/kas/PYSEC-2026-2544.yaml",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pypa/advisory-database/tree/main/vulns/kas/PYSEC-2026-2544.yaml"
        }
      ],
      "source": {
        "advisory": "GHSA-qjwp-hrq6-r26r",
        "discovery": "UNKNOWN"
      },
      "title": "kas checks out SHA-like git branches as valid commits"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47191",
    "datePublished": "2026-08-14T16:35:48.128Z",
    "dateReserved": "2026-05-18T22:07:37.435Z",
    "dateUpdated": "2026-08-18T02:10:29.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.