s1
--:--:--UTC

Searching APEX

Starting…

  1. ○ Searching Threats, IOCs & Threat Intelligence locally
  2. ○ Querying external providers
  3. ○ Asking AI Forensic Validator
  4. ○ Creating new entry from validated hit

0s elapsed

CVE-2026-42002

📛 CVE Title

Concurrency and locking defects in GSS-TSIG

⬇ Download JSON ⚠ View as Threat

Description

Concurrency and locking defects in GSS-TSIG

Overview

State
PUBLISHED
Assigner (CNA)
OX
CVSS severity
MEDIUM
CVSS score
CVSS 5.9 / 10 5.9 5.9 / 10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Effective score
5.9 / 10 MEDIUM source: CNA overview
CWE(s)
—
Reserved
2026-04-23
Published
2026-05-21 09:27 UTC
Last updated
2026-05-21 09:27 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/42xxx/CVE-2026-42002.json
Linked Threat
CVE-2026-42002 — CVE-2026-42002

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-21 10:16:25 UTC
NVD last modified
2026-05-21 15:27:51 UTC
NVD CVSS v3.1
CVSS 5.9 / 10 5.9 5.9 / 10 MEDIUM source: security@open-xchange.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
2.2 / 10
Impact subscore
3.6 / 10
EPSS score
0.0002 (probability of exploitation in next 30 days)
EPSS percentile
5.89% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD-assigned CWE(s): CWE-364 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-05-25 00:30 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-31260
Assigner
OX
Published
May 21, 2026, 9:27:04 AM
Updated
May 21, 2026, 11:59:46 AM
EUVD base score (CVSS 3.1)
5.9 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EUVD-reported EPSS
0.0200
Vendors
PowerDNS
Products
Authoritative (5.0.0 <5.0.5)
Authoritative (4.9.0 <4.9.15)
Aliases
GHSA-vx6m-m9qv-88q3

ENISA description: Concurrency and locking defects in GSS-TSIG

EUVD references (1)

Affected products (1)
VendorProductVersionsPlatforms
PowerDNS Authoritative 4.9.0 (affected), 5.0.0 (affected) —

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (16)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-42002.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected",
          "modules": [
            "GSS-TSIG"
          ],
          "packageName": "pdns",
          "product": "Authoritative",
          "programFiles": [
            "gss_context.cc"
          ],
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "versions": [
            {
              "lessThan": "4.9.15",
              "status": "affected",
              "version": "4.9.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.0.5",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "thanos_haruki"
        }
      ],
      "datePublic": "2026-05-19T22:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>Concurrency and locking defects in GSS-TSIG</p>"
            }
          ],
          "value": "Concurrency and locking defects in GSS-TSIG"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Signal Handler Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-21T09:27:04.431Z",
        "orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
        "shortName": "OX"
      },
      "references": [
        {
          "url": "https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Concurrency and locking defects in GSS-TSIG",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
    "assignerShortName": "OX",
    "cveId": "CVE-2026-42002",
    "datePublished": "2026-05-21T09:27:04.431Z",
    "dateReserved": "2026-04-23T11:15:21.198Z",
    "dateUpdated": "2026-05-21T09:27:04.431Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}