CVE-2026-102825

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{"affected": [{"affectedData": [{"product": "russh", "vendor": "Eugeny", "versions": [{"status": "affected", "version": "< 0.62.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Russh is a Rust SSH client and server library. Prior to 0.62.6, the USERAUTH_REQUEST path reached from server::run_stream in russh/src/server/encrypted.rs increments self.common.auth_attempts but never compares it with server::Config.max_auth_attempts. An unauthenticated remote client can continue submitting authentication requests on one connection beyond the configured cap, bypassing the deployment's attempt-limiting policy and increasing online guessing opportunity and backend authentication workload. This issue is fixed in version 0.62.6."}], "id": "CVE-2026-102825", "lastModified": "2026-09-30T20:17:24.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102825", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-30T19:29:11.461462Z", "version": "2.0.3"}}]}, "published": "2026-09-29T19:17:24.713", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/commit/f8fd0b11a393364dc7f01a182482d86adafdd653"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/releases/tag/v0.62.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-307"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "russh: russh: Authentication attempt limit bypass via unenforced maximum authentication attempts", "id": "2543507", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543507"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-307", "details": ["Russh is a Rust SSH client and server library. Prior to 0.62.6, the USERAUTH_REQUEST path reached from server::run_stream in russh/src/server/encrypted.rs increments self.common.auth_attempts but never compares it with server::Config.max_auth_attempts. An unauthenticated remote client can continue submitting authentication requests on one connection beyond the configured cap, bypassing the deployment's attempt-limiting policy and increasing online guessing opportunity and backend authentication workload. This issue is fixed in version 0.62.6.", "A flaw was found in russh. The server fails to enforce the configured limit on maximum authentication attempts during user authentication. An unauthenticated remote attacker can exploit this flaw by continuously submitting authentication requests over a single connection. This allows an attacker to bypass authentication attempt limits, facilitating brute-force credential guessing and placing an excessive workload on backend authentication systems."], "name": "CVE-2026-102825", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-29T18:31:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102825\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102825\nhttps://github.com/Eugeny/russh/commit/f8fd0b11a393364dc7f01a182482d86adafdd653\nhttps://github.com/Eugeny/russh/releases/tag/v0.62.6\nhttps://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.62.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "russh", "source": "cna", "vendor": "Eugeny"}, "product": "russh", "vendor": "eugeny"}], "created": "2026-09-29T21:30:08.562884+00:00", "updated": "2026-09-29T23:00:18.672557+00:00", "vendors": ["eugeny", "eugeny$PRODUCT$russh"]}