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vuln-cve/data/2026/77xxx/CVE-2026-77421.json
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{
"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"
}
}
]
}
}