CVE-2026-107835 (GCVE-0-2026-107835)
Vulnerability from cvelistv5
Published
2026-10-09 17:46
Modified
2026-10-09 18:24
Severity ?
4.0 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CWE
  • CWE-436 - Interpretation Conflict
Summary
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. Prior to 3.8.1, internal/cookies.ParseCookies in internal/cookies/cookies.go handles boundary ASCII control characters and control-only or empty cookie names differently from several backend cookie parsers. An unauthenticated attacker can craft a Cookie header so Coraza indexes or drops a cookie under a different name or value from the backend application, causing rules targeting REQUEST_COOKIES or REQUEST_COOKIES_NAMES to miss application-visible attacker data. Exploitation depends on the backend parser and affected rule scope, and interior control characters with inconsistent backend behavior are outside this advisory's remediation. This issue is fixed in version 3.8.1.
References
Impacted products
Vendor Product Version
corazawaf coraza Version: < 3.8.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107835",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T18:23:53.273353Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T18:24:00.100Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "coraza",
          "vendor": "corazawaf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.8.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. Prior to 3.8.1, internal/cookies.ParseCookies in internal/cookies/cookies.go handles boundary ASCII control characters and control-only or empty cookie names differently from several backend cookie parsers. An unauthenticated attacker can craft a Cookie header so Coraza indexes or drops a cookie under a different name or value from the backend application, causing rules targeting REQUEST_COOKIES or REQUEST_COOKIES_NAMES to miss application-visible attacker data. Exploitation depends on the backend parser and affected rule scope, and interior control characters with inconsistent backend behavior are outside this advisory\u0027s remediation. This issue is fixed in version 3.8.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-436",
              "description": "CWE-436: Interpretation Conflict",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-09T17:46:58.890Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9"
        },
        {
          "name": "https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461af",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461af"
        },
        {
          "name": "https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866"
        },
        {
          "name": "https://github.com/corazawaf/coraza/releases/tag/v3.8.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/corazawaf/coraza/releases/tag/v3.8.1"
        }
      ],
      "source": {
        "advisory": "GHSA-g4qm-m288-5cp9",
        "discovery": "UNKNOWN"
      },
      "title": "OWASP Coraza WAF: Cookie Parser Confusion"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-107835",
    "datePublished": "2026-10-09T17:46:58.890Z",
    "dateReserved": "2026-10-08T22:34:49.289Z",
    "dateUpdated": "2026-10-09T18:24:00.100Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-107835\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-09T18:23:53.273353Z\"}}}], \"references\": [{\"url\": \"https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-09T18:23:36.147Z\"}}], \"cna\": {\"title\": \"OWASP Coraza WAF: Cookie Parser Confusion\", \"source\": {\"advisory\": \"GHSA-g4qm-m288-5cp9\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"corazawaf\", \"product\": \"coraza\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.8.1\"}]}], \"references\": [{\"url\": \"https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9\", \"name\": \"https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461af\", \"name\": \"https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461af\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866\", \"name\": \"https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/corazawaf/coraza/releases/tag/v3.8.1\", \"name\": \"https://github.com/corazawaf/coraza/releases/tag/v3.8.1\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. Prior to 3.8.1, internal/cookies.ParseCookies in internal/cookies/cookies.go handles boundary ASCII control characters and control-only or empty cookie names differently from several backend cookie parsers. An unauthenticated attacker can craft a Cookie header so Coraza indexes or drops a cookie under a different name or value from the backend application, causing rules targeting REQUEST_COOKIES or REQUEST_COOKIES_NAMES to miss application-visible attacker data. Exploitation depends on the backend parser and affected rule scope, and interior control characters with inconsistent backend behavior are outside this advisory\u0027s remediation. This issue is fixed in version 3.8.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-436\", \"description\": \"CWE-436: Interpretation Conflict\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-10-09T17:46:58.890Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-107835\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-09T18:24:00.100Z\", \"dateReserved\": \"2026-10-08T22:34:49.289Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-10-09T17:46:58.890Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.