CVE-2026-33817: Withdrawn Advisory Go.etcd.io/bbolt Affected By Index Out-of-range Vulnerability

MODERATE
Advisory Identifier: GHSA-6jwv-w5xf-7j27
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CVSS 6.2
CWE-125
Published
Advisory Summary

CVE-2026-33817 is a MODERATE (CVSS 6.2) go.etcd.io/bbolt affected by index out-of-range vulnerability (CWE-125: Out-of-bounds Read) affecting Withdrawn Advisory libraries in the Go ecosystem. The issue involves go.etcd.io/bbolt affected by index out-of-range vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2026-33817 at a Glance

CVE Identifier CVE-2026-33817
GHSA Identifier GHSA-6jwv-w5xf-7j27
Severity MODERATE
CVSS v3.1 Base Score 6.2
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Withdrawn Advisory
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.2

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

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

How to Fix CVE-2026-33817

To remediate this vulnerability, upgrade all affected Withdrawn Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

go.etcd.io/bbolt fixed: Latest secure release 
Upgrade go.etcd.io/bbolt to Latest secure release
Verify Direct and Transitive Dependencies

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

inspect dependencies for go.etcd.io/bbolt

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-33817, inspect your project dependencies for Withdrawn Advisory:

inspect dependencies for go.etcd.io/bbolt

Analyze the terminal output to locate any version of Withdrawn Advisory in your dependency tree.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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. In Withdrawn Advisory, 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

### Withdrawn Advisory This advisory has been withdrawn because its CVE Numbering Authority has determined this issue to be a false positive. This link is maintained to preserve external references. ### Original Description Index out-of-range when encountering a branch page with zero elements in go.etcd.io/bbolt

CVE-2026-33817 Affected Withdrawn Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
go.etcd.io/bbolt
golang/go.etcd.io/bbolt
Go
≤ 1.4.3

References

NVD — CVE-2026-33817 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33817
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/golang/vulndb/issues/4923
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/etcd-io/bbolt/pull/1171/changes/386d5b69785937d1aa20cb25c8439404cf398143
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/etcd-io/bbolt
pkg.go.dev/vuln/go-2026-4923 WEB
https://pkg.go.dev/vuln/GO-2026-4923

Frequently Asked Questions

What is CVE-2026-33817?
CVE-2026-33817 is a security vulnerability in Withdrawn Advisory involving go.etcd.io/bbolt affected by index out-of-range vulnerability under CWE-125: Out-of-bounds Read.
Which Withdrawn Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: go.etcd.io/bbolt.
What version fixes CVE-2026-33817?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is go.etcd.io/bbolt affected?
Yes, go.etcd.io/bbolt is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-33817?
CVE-2026-33817 has a CVSS v3.1 base score of 6.2 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-33817?
CVE-2026-33817 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Go dependencies for CVE-2026-33817?
Run the dependency tree command: 'inspect dependencies for go.etcd.io/bbolt'. 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-6jwv-w5xf-7j27",
  "modified" : "2026-04-13T19:32:09Z",
  "published" : "2026-04-06T21:31:34Z",
  "withdrawn" : "2026-04-13T19:32:09Z",
  "aliases" : [ "CVE-2026-33817" ],
  "summary" : "Withdrawn Advisory: go.etcd.io/bbolt affected by index out-of-range vulnerability",
  "details" : "### Withdrawn Advisory\nThis advisory has been withdrawn because its CVE Numbering Authority has determined this issue to be a false positive. This link is maintained to preserve external references.\n\n### Original Description\nIndex out-of-range when encountering a branch page with zero elements in go.etcd.io/bbolt",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "go.etcd.io/bbolt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.4.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33817"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/golang/vulndb/issues/4923"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/etcd-io/bbolt/pull/1171/changes/386d5b69785937d1aa20cb25c8439404cf398143"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/etcd-io/bbolt"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2026-4923"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-08T00:15:13Z",
    "nvd_published_at" : "2026-04-06T19:16:27Z"
  }
}