CVE-2026-76243 (GCVE-0-2026-76243)

Vulnerability from cvelistv5 – Published: 2026-08-19 14:02 – Updated: 2026-08-19 14:02
VLAI
Title
stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth
Summary
stigmem versions before 0.9.0a2 allow unauthenticated access when authentication is disabled on non-loopback deployments. Attackers can perform read, write, and federation operations with anonymous identity when nodes are exposed outside local development environments.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
eidetic-labs stigmem Affected: 0 , < 0.9.0a2 (custom)
Unaffected: 0.9.0a2 (custom)
guessed Create a notification for this product.
Date Public
2026-05-19 00:00
Show details on NVD website
To clipboard 

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          "packageURL": "pkg:pypi/stigmem-node",
          "product": "stigmem",
          "vendor": "eidetic-labs",
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              "status": "affected",
              "version": "0",
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            },
            {
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              "version": "0.9.0a2",
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      ],
      "datePublic": "2026-05-19T00:00:00.000Z",
      "descriptions": [
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        }
      ],
      "metrics": [
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            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.2,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T14:02:20.160Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-fp6w-8wpg-74g5)",
          "tags": [
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          ],
          "url": "https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5"
        },
        {
          "name": "VulnCheck Advisory: stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/stigmem-before-0a2-authentication-bypass-via-disabled-auth"
        }
      ],
      "title": "stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76243",
    "datePublished": "2026-08-19T14:02:20.160Z",
    "dateReserved": "2026-08-19T11:38:33.225Z",
    "dateUpdated": "2026-08-19T14:02:20.160Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-76243",
      "date": "2026-08-20",
      "epss": "0.004",
      "percentile": "0.33427"
    },
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  }
}



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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.

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