CVE-2026-42770: Software Security Vulnerability Vulnerability
LOWCVE-2026-42770 is a LOW (CVSS 3.7) security vulnerability vulnerability (CWE-325: Missing Cryptographic Step) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-42770 at a Glance
Security Impact
CVSS: 3.7
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2026-42770
To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-42770, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-325: Missing Cryptographic Step, where the product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
References
Frequently Asked Questions
What is CVE-2026-42770?
Which Software versions are affected?
What version fixes CVE-2026-42770?
What is the CVSS score of CVE-2026-42770?
What CWE is associated with CVE-2026-42770?
How can I check Maven dependencies for CVE-2026-42770?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3cxm-476w-ghm2",
"modified" : "2026-07-20T18:32:21Z",
"published" : "2026-06-09T18:30:43Z",
"aliases" : [ "CVE-2026-42770" ],
"details" : "Issue summary: When EVP_PKEY_derive_set_peer() is called with a DHX (X9.42)\npeer key, the peer key is not properly checked for the subgroup membership.\n\nImpact summary: A malicious peer which presents an X9.42 key carrying the\nvictim's p and g parameters, a forged q = r (a small prime factor of the\ncofactor (p−1)/q_local), and a public value Y of order r can recover the\nvictim's private key after a small number of key exchange attempts.\n\nWhen EVP_PKEY_derive_set_peer() is called with a DHX (X9.42) peer key, the\nsubgroup membership check Y^q ≡ 1 (mod p) is performed using the peer's\nown q parameter, not the local key's q. The peer's domain parameters are\nthen matched against the domain parameters of the private key, but the value\nof q is not compared.\n\nA malicious peer who presents an X9.42 key carrying the victim's p, g,\na forged q = r (a small prime factor of the cofactor), and a public\nvalue Y of order r passes all checks. The shared secret then takes only\nr distinct values, leaking priv mod r. Repeating for each small-prime\nfactor of the cofactor and combining via CRT recovers the full private\nkey (Lim–Lee / small-subgroup-confinement attack).\n\nThe realistic attack surface is narrow: principally CMP deployments with\nlong-lived RA/CA DHX keys and bespoke enterprise or government applications\nusing X9.42 DHX static keys with interactive protocols and therefore this\nissue was assigned Low severity.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are affected by this\nissue.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-42770"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/3da5a516cd2635a320ff748503db2cef7c4b0f02"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/3ddbb7ab50bd93dfc59cbe08e269a67605aeebdb"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/5f452bba2c681423d8fcffd120a19b757ee42e3c"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/7fbfde7677ed8808828bf00ff01c937ca04bdda2"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/ca2237ab5615641b662183b077f62c08d75e8070"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/3da5a516cd2635a320ff748503db2cef7c4b0f02"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/3ddbb7ab50bd93dfc59cbe08e269a67605aeebdb"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/5f452bba2c681423d8fcffd120a19b757ee42e3c"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/7fbfde7677ed8808828bf00ff01c937ca04bdda2"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/ca2237ab5615641b662183b077f62c08d75e8070"
}, {
"type" : "WEB",
"url" : "https://openssl-library.org/news/secadv/20260609.txt"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-325" ],
"severity" : "LOW",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-06-09T17:17:08Z"
}
}