CVE-2026-7383: Software Security Vulnerability Vulnerability
HIGHCVE-2026-7383 is a HIGH (CVSS 8.1) security vulnerability vulnerability (CWE-787: Out-of-bounds Write) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-7383 at a Glance
Security Impact
CVSS: 8.1
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:H/I:H/A:H).
How to Fix CVE-2026-7383
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-2026-7383, 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. 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-2026-7383?
Which Software versions are affected?
What version fixes CVE-2026-7383?
What is the CVSS score of CVE-2026-7383?
What CWE is associated with CVE-2026-7383?
How can I check Maven dependencies for CVE-2026-7383?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-w853-v86g-gv7j",
"modified" : "2026-06-10T09:31:57Z",
"published" : "2026-06-09T18:31:01Z",
"aliases" : [ "CVE-2026-7383" ],
"details" : "Issue summary: A signed integer overflow when sizing the destination\nbuffer for Unicode output in ASN1_mbstring_ncopy() can lead to a heap\nbuffer overflow.\n\nImpact summary: A heap buffer overflow may lead to a crash or possibly\nattacker controlled code execution or other undefined behaviour.\n\nIn ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination\nsize for Unicode output is computed in a signed int: by left shift\nof the input character count for BMPSTRING (UTF-16) and\nUNIVERSALSTRING (UTF-32), and by summing per-character byte counts\nfor UTF8STRING. The calculation overflows when the input reaches\naround 2^30 characters. In the worst case (UNIVERSALSTRING at 2^30\ncharacters) the size wraps to zero, OPENSSL_malloc(1) is called, and\nthe subsequent character copy writes several gigabytes past the\none-byte allocation.\n\nX.509 certificate processing routes through ASN1_STRING_set_by_NID(),\nwhose DIRSTRING_TYPE mask excludes UNIVERSALSTRING and whose per-NID\nsize limits cap the input length; no network protocol or\ncertificate-handling path in OpenSSL exercises the overflow.\nTriggering the bug requires an application that calls\nASN1_mbstring_copy() or ASN1_mbstring_ncopy() directly, or registers\na custom string type via ASN1_STRING_TABLE_add(), with\nattacker-controlled input on the order of half a gigabyte or more.\nFor these reasons this issue was assigned Low severity.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by\nthis issue, as the affected code is outside the OpenSSL FIPS module\nboundary.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-7383"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/4f8d2bddaa2c8e06f9c33390ee1717059a6e4be6"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/80c15faaf78042bbb8654a0e234c50c381732f74"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/bd17511070fb39a67bfa19682affb765e706a974"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/c332adaced43bcbb85f97410597e951c11ec3083"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/openssl/commit/d32350ae8ef7426718f5aa9e383d4b51398ee255"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/4f8d2bddaa2c8e06f9c33390ee1717059a6e4be6"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/80c15faaf78042bbb8654a0e234c50c381732f74"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/bd17511070fb39a67bfa19682affb765e706a974"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/c332adaced43bcbb85f97410597e951c11ec3083"
}, {
"type" : "WEB",
"url" : "https://github.com/openssl/security/commit/d32350ae8ef7426718f5aa9e383d4b51398ee255"
}, {
"type" : "WEB",
"url" : "https://openssl-library.org/news/secadv/20260609.txt"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-787" ],
"severity" : "HIGH",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-06-09T17:17:50Z"
}
}