{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-77281",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-20T19:14:21.331Z",
        "datePublished": "2026-09-17T21:04:58.400Z",
        "dateUpdated": "2026-09-18T14:43:34.818Z"
    },
    "containers": {
        "cna": {
            "title": "Caddy: rewrite placeholder re-expansion",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-94",
                            "lang": "en",
                            "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-178",
                            "lang": "en",
                            "description": "CWE-178: Improper Handling of Case Sensitivity",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "lang": "en",
                            "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/caddyserver/caddy/security/advisories/GHSA-j8px-rmrx-76h9",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-j8px-rmrx-76h9"
                },
                {
                    "name": "https://github.com/caddyserver/caddy/pull/7761",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/caddyserver/caddy/pull/7761"
                },
                {
                    "name": "https://github.com/caddyserver/caddy/commit/176b043b0104cee3f894023cd5a598ac29e404bb",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/caddyserver/caddy/commit/176b043b0104cee3f894023cd5a598ac29e404bb"
                },
                {
                    "name": "https://github.com/caddyserver/caddy/releases/tag/v2.11.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/caddyserver/caddy/releases/tag/v2.11.4"
                }
            ],
            "affected": [
                {
                    "vendor": "caddyserver",
                    "product": "caddy",
                    "versions": [
                        {
                            "version": "< 2.11.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-17T21:04:58.400Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Caddy is an extensible server platform that uses TLS by default. In version 2.11.3 and earlier, three configuration-dependent weaknesses affect the handler and placeholder layer. In modules/caddyhttp/rewrite/rewrite.go, Rewrite.Rewrite() can pass attacker-controlled replacement bytes through buildQueryString for a second placeholder expansion when a rewrite URI ends with a literal question mark, allowing injected environment or request-variable placeholders to disclose data and, when the file provider is registered, allowing injected file placeholders to disclose readable files. The  issue is fixed in version 2.11.4."
                }
            ],
            "source": {
                "advisory": "GHSA-j8px-rmrx-76h9",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-18T14:39:55.254322Z",
                                "id": "CVE-2026-77281",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-18T14:43:34.818Z"
                }
            }
        ]
    }
}