CVE-2026-77423

{"id": "CVE-2026-77423", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77423", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-24T14:10:41.490849Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "jline", "product": "jline3", "versions": [{"status": "affected", "version": ">= 3.0.0, < 3.30.15"}, {"status": "affected", "version": ">= 4.0.0, < 4.3.1"}]}]}], "published": "2026-09-23T19:19:16.017", "references": [{"url": "https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206ae", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/pull/2012", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/pull/2018", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/releases/tag/4.3.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/releases/tag/jline-3.30.15", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx", "source": "security-advisories@github.com"}, {"url": "https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1333"}]}], "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 less viewer passes user-controlled search and display-filter patterns from getPattern(boolean doDisplayPattern) in builtins/src/main/java/org/jline/builtins/Less.java directly to Java's backtracking regular expression engine and repeatedly applies them to file content. A nested-quantifier expression evaluated against non-matching lines can consume excessive CPU and indefinitely block the session thread, and repeated sessions in Telnet or SSH deployments can exhaust a bounded worker pool. This issue is fixed in versions 3.30.15 and 4.3.1."}], "lastModified": "2026-09-30T16:44:39.840", "sourceIdentifier": "security-advisories@github.com"}