CVE-2026-89783: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-w5hj-mmmx-p42j
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89783 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89783 at a Glance

CVE Identifier CVE-2026-89783
GHSA Identifier GHSA-w5hj-mmmx-p42j
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-89783

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.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-89783, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze 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 General Security Weakness. 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

In the Linux kernel, the following vulnerability has been resolved: xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full The depth check in xfrm6_input_addr() is off by one: if (1 + sp->len == XFRM_MAX_DEPTH) goto drop; ... sp->xvec[sp->len++] = x; xfrm_input() can leave sp->len == XFRM_MAX_DEPTH, and the transport-mode receive path re-enters IPv6 input via xfrm_trans_reinject() with that secpath preserved. If the inner packet carries a destination-options HAO option or a type-2 routing header, xfrm6_input_addr() is called with sp->len == XFRM_MAX_DEPTH; the check (1 + 6 == 6) is false, so sp->xvec[sp->len++] writes one slot past the 6-element xvec[]. The write stays within the sec_path allocation (invisible to KASAN); UBSAN_BOUNDS flags it and panics under panic_on_warn. Use "sp->len >= XFRM_MAX_DEPTH", matching xfrm_input(). This also restores one chain level the old check rejected at sp->len == 5. UBSAN: array-index-out-of-bounds in net/ipv6/xfrm6_input.c:309:10 index 6 is out of range for type 'xfrm_state *[6]'

References

NVD — CVE-2026-89783 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89783
git.kernel.org/stable/c/0f679e0523... WEB
https://git.kernel.org/stable/c/0f679e0523ddfff3fb554336ceb874b0e51e9cd3
git.kernel.org/stable/c/4899664922... WEB
https://git.kernel.org/stable/c/48996649222e95008cdb98cd58579e3fc8e5ee06
git.kernel.org/stable/c/5d9e3bf34f... WEB
https://git.kernel.org/stable/c/5d9e3bf34fec9a5d237e4b7cef4a707bc2e091bc
git.kernel.org/stable/c/5f35a29a5e... WEB
https://git.kernel.org/stable/c/5f35a29a5eed3d80befd32050843ac88dea3d61a
git.kernel.org/stable/c/68e8737fe8... WEB
https://git.kernel.org/stable/c/68e8737fe8e72f085c608cff322b3d2de8340af1
git.kernel.org/stable/c/8fe2c53fb8... WEB
https://git.kernel.org/stable/c/8fe2c53fb81f5ad5be43af2ad09583f7c78b4b77
git.kernel.org/stable/c/91fc387f63... WEB
https://git.kernel.org/stable/c/91fc387f63c00ddfb5221127a17bac97549a8343
git.kernel.org/stable/c/bdcda866c8... WEB
https://git.kernel.org/stable/c/bdcda866c89f9a8b1acdabf02d26cde9fbe501d8

Frequently Asked Questions

What is CVE-2026-89783?
CVE-2026-89783 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-89783?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89783?
CVE-2026-89783 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89783?
CVE-2026-89783 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89783?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w5hj-mmmx-p42j",
  "modified" : "2026-09-16T15:30:57Z",
  "published" : "2026-09-16T09:30:30Z",
  "aliases" : [ "CVE-2026-89783" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full\n\nThe depth check in xfrm6_input_addr() is off by one:\n\n  if (1 + sp->len == XFRM_MAX_DEPTH)\n          goto drop;\n  ...\n  sp->xvec[sp->len++] = x;\n\nxfrm_input() can leave sp->len == XFRM_MAX_DEPTH, and the transport-mode\nreceive path re-enters IPv6 input via xfrm_trans_reinject() with that\nsecpath preserved. If the inner packet carries a destination-options HAO\noption or a type-2 routing header, xfrm6_input_addr() is called with\nsp->len == XFRM_MAX_DEPTH; the check (1 + 6 == 6) is false, so\nsp->xvec[sp->len++] writes one slot past the 6-element xvec[]. The write\nstays within the sec_path allocation (invisible to KASAN); UBSAN_BOUNDS\nflags it and panics under panic_on_warn.\n\nUse \"sp->len >= XFRM_MAX_DEPTH\", matching xfrm_input(). This also\nrestores one chain level the old check rejected at sp->len == 5.\n\n  UBSAN: array-index-out-of-bounds in net/ipv6/xfrm6_input.c:309:10\n  index 6 is out of range for type 'xfrm_state *[6]'",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89783"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0f679e0523ddfff3fb554336ceb874b0e51e9cd3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/48996649222e95008cdb98cd58579e3fc8e5ee06"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5d9e3bf34fec9a5d237e4b7cef4a707bc2e091bc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5f35a29a5eed3d80befd32050843ac88dea3d61a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/68e8737fe8e72f085c608cff322b3d2de8340af1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8fe2c53fb81f5ad5be43af2ad09583f7c78b4b77"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/91fc387f63c00ddfb5221127a17bac97549a8343"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bdcda866c89f9a8b1acdabf02d26cde9fbe501d8"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T09:17:08Z"
  }
}