CVE-2026-15541 (GCVE-0-2026-15541)

Vulnerability from cvelistv5 – Published: 2026-07-13 06:45 – Updated: 2026-07-13 06:45
VLAI
Title
will-moss Isaiah Master Websocket server.go Server.Handle authorization
Summary
A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
7.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
CWE
Assigner
References
Impacted products
Vendor Product Version
will-moss Isaiah Affected: 1.36.0
Affected: 1.36.1
Affected: 1.36.2
Affected: 1.36.3
Affected: 1.36.4
Affected: 1.36.5
Affected: 1.36.6
Affected: 1.36.7
Affected: 1.36.8
Affected: 1.36.9
    cpe:2.3:a:will-moss:isaiah:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Dem0000000 (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:will-moss:isaiah:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Master Websocket Handler"
          ],
          "product": "Isaiah",
          "vendor": "will-moss",
          "versions": [
            {
              "status": "affected",
              "version": "1.36.0"
            },
            {
              "status": "affected",
              "version": "1.36.1"
            },
            {
              "status": "affected",
              "version": "1.36.2"
            },
            {
              "status": "affected",
              "version": "1.36.3"
            },
            {
              "status": "affected",
              "version": "1.36.4"
            },
            {
              "status": "affected",
              "version": "1.36.5"
            },
            {
              "status": "affected",
              "version": "1.36.6"
            },
            {
              "status": "affected",
              "version": "1.36.7"
            },
            {
              "status": "affected",
              "version": "1.36.8"
            },
            {
              "status": "affected",
              "version": "1.36.9"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Dem0000000 (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance."
        }
      ],
      "metrics": [
        {
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            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X",
            "version": "4.0"
          }
        },
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          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R",
            "version": "3.1"
          }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-13T06:45:10.052Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-377891 | will-moss Isaiah Master Websocket server.go Server.Handle authorization",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/377891"
        },
        {
          "name": "VDB-377891 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/377891/cti"
        },
        {
          "name": "CVE-2026-15541 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-15541"
        },
        {
          "name": "Submit #855074 | will-moss Isaiah 1.36.9 CWE-862 Missing Authorization",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/855074"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/will-moss/isaiah/issues/34"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/will-moss/isaiah/pull/35"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/will-moss/isaiah/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-12T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-07-12T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-07-12T20:17:31.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "will-moss Isaiah Master Websocket server.go Server.Handle authorization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-15541",
    "datePublished": "2026-07-13T06:45:10.052Z",
    "dateReserved": "2026-07-12T18:12:28.084Z",
    "dateUpdated": "2026-07-13T06:45:10.052Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-15541",
      "date": "2026-07-13",
      "epss": "0.00316",
      "percentile": "0.23548"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-15541\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-07-13T08:16:20.600\",\"lastModified\":\"2026-07-13T08:16:20.600\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.\"}],\"affected\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"will-moss\",\"product\":\"Isaiah\",\"cpes\":[\"cpe:2.3:a:will-moss:isaiah:*:*:*:*:*:*:*:*\"],\"modules\":[\"Master Websocket Handler\"],\"versions\":[{\"version\":\"1.36.0\",\"status\":\"affected\"},{\"version\":\"1.36.1\",\"status\":\"affected\"},{\"version\":\"1.36.2\",\"status\":\"affected\"},{\"version\":\"1.36.3\",\"status\":\"affected\"},{\"version\":\"1.36.4\",\"status\":\"affected\"},{\"version\":\"1.36.5\",\"status\":\"affected\"},{\"version\":\"1.36.6\",\"status\":\"affected\"},{\"version\":\"1.36.7\",\"status\":\"affected\"},{\"version\":\"1.36.8\",\"status\":\"affected\"},{\"version\":\"1.36.9\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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\",\"baseScore\":6.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":7.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":3.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":7.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-862\"},{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"references\":[{\"url\":\"https://github.com/will-moss/isaiah/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/will-moss/isaiah/issues/34\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/will-moss/isaiah/pull/35\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/cve/CVE-2026-15541\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/855074\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/377891\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/377891/cti\",\"source\":\"cna@vuldb.com\"}]}}"
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.