{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-77421",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-20T19:59:59.603Z",
        "datePublished": "2026-09-23T18:07:21.134Z",
        "dateUpdated": "2026-09-23T19:43:56.607Z"
    },
    "containers": {
        "cna": {
            "title": "JLine: ReDoS in Nano Editor Regex Search Mode",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1333",
                            "lang": "en",
                            "description": "CWE-1333: Inefficient Regular Expression Complexity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/jline/jline3/security/advisories/GHSA-ph9c-7hw9-vhhw",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/jline/jline3/security/advisories/GHSA-ph9c-7hw9-vhhw"
                },
                {
                    "name": "https://github.com/jline/jline3/pull/2012",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/pull/2012"
                },
                {
                    "name": "https://github.com/jline/jline3/pull/2018",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/pull/2018"
                },
                {
                    "name": "https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541"
                },
                {
                    "name": "https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206ae",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206ae"
                },
                {
                    "name": "https://github.com/jline/jline3/releases/tag/4.3.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/releases/tag/4.3.1"
                },
                {
                    "name": "https://github.com/jline/jline3/releases/tag/jline-3.30.15",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jline/jline3/releases/tag/jline-3.30.15"
                }
            ],
            "affected": [
                {
                    "vendor": "jline",
                    "product": "jline3",
                    "versions": [
                        {
                            "version": ">= 3.0.0, < 3.30.15",
                            "status": "affected"
                        },
                        {
                            "version": ">= 4.0.0, < 4.3.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-23T18:07:21.134Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "JLine is a Java library for handling console input. From 3.0.0 until 3.30.15 and 4.3.1, the JLine built-in nano editor's regex search mode passes a user-controlled search term from doSearch(String text) in builtins/src/main/java/org/jline/builtins/Nano.java to Java's backtracking regular expression engine without a timeout or backtracking bound. A nested-quantifier expression evaluated against non-matching buffer content can consume excessive CPU and indefinitely block the editor session thread, and remote multi-user deployments can lose a worker thread for each affected session. This issue is fixed in versions 3.30.15 and 4.3.1."
                }
            ],
            "source": {
                "advisory": "GHSA-ph9c-7hw9-vhhw",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-23T19:05:07.485942Z",
                                "id": "CVE-2026-77421",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2026-09-23T19:43:56.607Z"
                }
            }
        ]
    }
}