CVE-2026-24785

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{"affected": [{"affectedData": [{"product": "clatter", "vendor": "jmlepisto", "versions": [{"status": "affected", "version": "< 2.2.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jmlepisto:clatter:*:*:*:*:*:rust:*:*", "matchCriteriaId": "F10608C7-D4BE-4334-9389-2ACE5BBA204D", "versionEndExcluding": "2.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Clatter is a no_std compatible, pure Rust implementation of the Noise protocol framework with post-quantum support. Versiosn prior to2.2.0 have a protocol compliance vulnerability. The library allowed post-quantum handshake patterns that violated the PSK validity rule (Noise Protocol Framework Section 9.3). This could allow PSK-derived keys to be used for encryption without proper randomization by self-chosen ephemeral randomness, weakening security guarantees and potentially allowing catastrophic key reuse. Affected default patterns include `noise_pqkk_psk0`, `noise_pqkn_psk0`, `noise_pqnk_psk0`, `noise_pqnn_psk0``, and some hybrid variants. Users of these patterns may have been using handshakes that do not meet the intended security properties. The issue is fully patched and released in Clatter v2.2.0. The fixed version includes runtime checks to detect offending handshake patterns. As a workaround, avoid using offending `*_psk0` variants of post-quantum patterns. Review custom handshake patterns carefully."}, {"lang": "es", "value": "Clatter es una implementaci\u00f3n pura de Rust, compatible con no_std, del framework del protocolo Noise con soporte post-cu\u00e1ntico. Las versiones anteriores a 2.2.0 tienen una vulnerabilidad de cumplimiento del protocolo. La librer\u00eda permit\u00eda patrones de handshake post-cu\u00e1nticos que violaban la regla de validez de PSK (Framework del Protocolo Noise Secci\u00f3n 9.3). Esto podr\u00eda permitir que las claves derivadas de PSK se usaran para cifrado sin una aleatorizaci\u00f3n adecuada por aleatoriedad ef\u00edmera auto-elegida, debilitando las garant\u00edas de seguridad y potencialmente permitiendo la reutilizaci\u00f3n catastr\u00f3fica de claves. Los patrones predeterminados afectados incluyen 'noise_pqkk_psk0', 'noise_pqkn_psk0', 'noise_pqnk_psk0', 'noise_pqnn_psk0', y algunas variantes h\u00edbridas. Los usuarios de estos patrones pueden haber estado utilizando handshakes que no cumplen con las propiedades de seguridad previstas. El problema est\u00e1 completamente parcheado y lanzado en Clatter v2.2.0. La versi\u00f3n corregida incluye comprobaciones en tiempo de ejecuci\u00f3n para detectar patrones de handshake ofensivos. Como soluci\u00f3n alternativa, evite usar las variantes ofensivas '*_psk0' de patrones post-cu\u00e1nticos. Revise cuidadosamente los patrones de handshake personalizados."}], "id": "CVE-2026-24785", "lastModified": "2026-06-17T10:23:35.443", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24785", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-28T15:10:25.579034Z", "version": "2.0.3"}}]}, "published": "2026-01-28T00:15:50.623", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/jmlepisto/clatter/commit/b65ae6e9b8019bed5407771e21f89ddff17c5a71"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/jmlepisto/clatter/security/advisories/GHSA-253q-9q78-63x4"}, {"source": "security-advisories@github.com", "tags": ["Technical Description"], "url": "https://noiseprotocol.org/noise.html#validity-rule"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-327"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T01:52:01.920980+00:00", "value": {"mitigation_remediation": ["Update Clatter to version 2.2.0 or newer to receive the official fix.", "Avoid using any *_psk0 post\u2011quantum handshake patterns until the library is updated, and review any custom handshake definitions to ensure they comply with the PSK validity rule.", "If an upgrade cannot be performed immediately, restrict the application to use only non\u2011PSK or strictly validated handshake patterns and monitor for any anomalies related to key reuse."], "summary": {"action": "Apply Patch", "impact": "Key misuse due to PSK validity rule violation"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the \"jmlepisto:clatter\" library in all releases older than 2.2.0. Default post\u2011quantum handshake patterns, such as noise_pqkk_psk0, noise_pqkn_psk0, noise_pqnk_psk0, noise_pqnn_psk0 and several hybrid variants, are impacted. Users incorporating these patterns in their applications are exposed.", "description_and_impact": "Clatter, a Rust implementation of the Noise protocol, contains a protocol compliance flaw in versions before 2.2.0. The library accepted post\u2011quantum handshake patterns that violate the PSK validity rule, allowing PSK\u2011derived keys to be combined with self\u2011chosen nonce values without proper randomization. This undermines the integrity of encryption and can enable catastrophic key reuse, effectively erasing the confidentiality guarantees of the protocol.", "risk_and_exploitability": "The CVSS score of 8 indicates a high severity, while the EPSS score of less than 1\u202f% suggests a low likelihood of exploitation in the wild. The flaw is not listed in the CISA KEV catalog. Exploitation requires an application to use the vulnerable library in a handshake that contains a *psk0* pattern; an attacker who can influence the handshake parameter selection could obtain a weak key and conduct cryptographic attacks. The likely attack vector is through libraries used in server or client software that opts for post\u2011quantum Noise patterns without verifying the PSK validity rule."}}}}, "created": "2026-01-28T12:21:59.951163+00:00", "updated": "2026-04-18T02:00:10.464623+00:00", "vendors": ["jmlepisto", "jmlepisto$PRODUCT$clatter"]}