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    2 vulnerabilities by LangChat

    CVE-2026-111704 (GCVE-0-2026-111704)

    Vulnerability from nvd – Published: 2026-10-16 17:39 – Updated: 2026-10-16 17:39
    VLAI
    Title
    LangChat through commit 2a6285a Missing Authentication on REST API Controllers
    Summary
    LangChat through commit 2a6285a contains a missing authentication vulnerability that allows unauthenticated remote attackers to access REST controllers because no Sa-Token interceptor is registered. Attackers can query /api/v1/auth/users to read plaintext passwords, retrieve LLM provider API keys, create super-admin accounts, and modify or delete data.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6487 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    LangChat langchat Affected: 0 , ≤ 2a6285a6b8c51d51cdc599771bb667a30bc03f5c (git)
    		Create a notification for this product.
    Date Public
    2026-10-16 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/LangChat/langchat",
          "product": "langchat",
          "repo": "https://github.com/LangChat/langchat",
          "vendor": "LangChat",
          "versions": [
            {
              "lessThanOrEqual": "2a6285a6b8c51d51cdc599771bb667a30bc03f5c",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "hieuPenguinnn"
        }
      ],
      "datePublic": "2026-10-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "LangChat through commit 2a6285a contains a missing authentication vulnerability that allows unauthenticated remote attackers to access REST controllers because no Sa-Token interceptor is registered. Attackers can query /api/v1/auth/users to read plaintext passwords, retrieve LLM provider API keys, create super-admin accounts, and modify or delete data."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
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        },
        {
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            "baseScore": 9.8,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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      ],
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      ],
      "providerMetadata": {
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          "url": "https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33"
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          "url": "https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/controller/AigcUserController.java#L25-L60"
        },
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        },
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          "url": "https://www.vulncheck.com/advisories/langchat-through-commit-2a6285a-missing-authentication-on-rest-api-controllers"
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      ],
      "title": "LangChat through commit 2a6285a Missing Authentication on REST API Controllers",
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  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-111704",
    "datePublished": "2026-10-16T17:39:56.489Z",
    "dateReserved": "2026-10-16T14:31:22.259Z",
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    CVE-2026-111704 (GCVE-0-2026-111704)

    Vulnerability from cvelistv5 – Published: 2026-10-16 17:39 – Updated: 2026-10-16 17:39
    VLAI
    Title
    LangChat through commit 2a6285a Missing Authentication on REST API Controllers
    Summary
    LangChat through commit 2a6285a contains a missing authentication vulnerability that allows unauthenticated remote attackers to access REST controllers because no Sa-Token interceptor is registered. Attackers can query /api/v1/auth/users to read plaintext passwords, retrieve LLM provider API keys, create super-admin accounts, and modify or delete data.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6487 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    LangChat langchat Affected: 0 , ≤ 2a6285a6b8c51d51cdc599771bb667a30bc03f5c (git)
    		Create a notification for this product.
    Date Public
    2026-10-16 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

    {
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/LangChat/langchat",
          "product": "langchat",
          "repo": "https://github.com/LangChat/langchat",
          "vendor": "LangChat",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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          ]
        }
      ],
      "credits": [
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          "value": "hieuPenguinnn"
        }
      ],
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      "descriptions": [
        {
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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      ],
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      ],
      "providerMetadata": {
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        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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          "url": "https://hackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposure"
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          "url": "https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33"
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