CVE-2026-71193

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-13. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an overlapping zone that conflicts with another tenant's zone. This enables cross-tenant DNS hijack (redirecting traffic to attacker-controlled IPs) and DNS denial of service (NODATA responses). Exploitation requires a multi-pool deployment with AttributeFilter enabled in scheduler_filters, which is a non-default but documented and supported configuration for self-service tiering.

CVSS v3
9.6
EG Score
9.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 15, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

oss-security - [OSSA-2026-034] OpenStack Designate: Cross-tenant DNS zone overlap and mDNS DoS via pool scheduling (CVE-2026-71193, CVE-2026-71194)

https://www.openwall.com/lists/oss-security/2026/08/11/6
generic

OSSA-2026-034: Cross-tenant DNS zone overlap and mDNS DoS via pool scheduling — OpenStack Security Advisories 0.0.1.dev369 documentation

https://security.openstack.org/ossa/OSSA-2026-034.html
generic🔴 Active Exploitation

Bug #2160533 “[OSSA-2026-034] Designate cross-tenant DNS zone ov...” : Bugs : Designate

https://launchpad.net/bugs/2160533

Vendor Advisories for CVE-2026-71193(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 59× in last 7d / 76× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 05:33 UTCGHSA enrichment
  2. 2026-08-21 01:40 UTCEG score recompute
  3. 2026-08-21 01:40 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 21:49 UTCGHSA enrichment
  6. 2026-08-20 17:57 UTCGHSA enrichment
  7. 2026-08-20 14:05 UTCGHSA enrichment
  8. 2026-08-20 10:00 UTCGHSA enrichment
  9. 2026-08-20 06:09 UTCGHSA enrichment
  10. 2026-08-20 02:17 UTCGHSA enrichment
  11. 2026-08-19 22:25 UTCGHSA enrichment
  12. 2026-08-19 18:32 UTCEG score recompute
  13. 2026-08-19 18:32 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 14:36 UTCGHSA enrichment
  16. 2026-08-19 10:41 UTCGHSA enrichment
  17. 2026-08-19 06:47 UTCGHSA enrichment
  18. 2026-08-19 02:55 UTCGHSA enrichment
  19. 2026-08-18 22:59 UTCGHSA enrichment
  20. 2026-08-18 19:07 UTCGHSA enrichment
  21. 2026-08-18 15:13 UTCEG score recompute
  22. 2026-08-18 15:13 UTCGHSA enrichment
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 13:49 UTCEPSS rescore
  25. 2026-08-18 10:42 UTCGHSA enrichment
Show 51 more
  1. 2026-08-18 06:50 UTCGHSA enrichment
  2. 2026-08-18 02:58 UTCGHSA enrichment
  3. 2026-08-17 23:07 UTCGHSA enrichment
  4. 2026-08-17 19:13 UTCGHSA enrichment
  5. 2026-08-17 15:02 UTCEG score recompute
  6. 2026-08-17 15:02 UTCGHSA enrichment
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-17 11:10 UTCGHSA enrichment
  9. 2026-08-17 07:18 UTCGHSA enrichment
  10. 2026-08-17 03:27 UTCGHSA enrichment
  11. 2026-08-16 23:35 UTCGHSA enrichment
  12. 2026-08-16 19:43 UTCGHSA enrichment
  13. 2026-08-16 15:51 UTCEG score recompute
  14. 2026-08-16 15:51 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 11:59 UTCGHSA enrichment
  18. 2026-08-16 08:07 UTCGHSA enrichment
  19. 2026-08-16 04:16 UTCEG score recompute
  20. 2026-08-16 04:16 UTCGHSA enrichment
  21. 2026-08-16 02:15 UTCEPSS rescore
  22. 2026-08-16 00:24 UTCGHSA enrichment
  23. 2026-08-15 20:32 UTCGHSA enrichment
  24. 2026-08-15 16:40 UTCGHSA enrichment
  25. 2026-08-15 12:48 UTCGHSA enrichment
  26. 2026-08-15 08:56 UTCGHSA enrichment
  27. 2026-08-15 05:04 UTCEG score recompute
  28. 2026-08-15 05:04 UTCGHSA enrichment
  29. 2026-08-15 01:31 UTCEPSS rescore
  30. 2026-08-15 01:12 UTCGHSA enrichment
  31. 2026-08-14 21:20 UTCGHSA enrichment
  32. 2026-08-14 17:26 UTCGHSA enrichment
  33. 2026-08-14 13:34 UTCGHSA enrichment
  34. 2026-08-14 09:43 UTCGHSA enrichment
  35. 2026-08-14 05:51 UTCGHSA enrichment
  36. 2026-08-14 02:00 UTCGHSA enrichment
  37. 2026-08-13 22:08 UTCEG score recompute
  38. 2026-08-13 22:08 UTCGHSA enrichment
  39. 2026-08-13 22:00 UTCEPSS rescore
  40. 2026-08-13 18:16 UTCGHSA enrichment
  41. 2026-08-13 14:24 UTCEG score recompute
  42. 2026-08-13 14:24 UTCGHSA enrichment
  43. 2026-08-13 13:56 UTCEG score recompute
  44. 2026-08-13 13:56 UTCGHSA enrichment
  45. 2026-08-13 10:59 UTCGHSA enrichment
  46. 2026-08-13 07:07 UTCGHSA enrichment
  47. 2026-08-13 03:13 UTCEG score recompute
  48. 2026-08-13 03:13 UTCGHSA enrichment
  49. 2026-08-12 23:22 UTCEG score recompute
  50. 2026-08-12 22:36 UTCEG score recompute
  51. 2026-08-12 22:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71193?
CVE-2026-71193 is a critical vulnerability published on August 12, 2026. In OpenStack Designate before 22.0.1, zone creation checks (issubzone, issuperzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an…
When was CVE-2026-71193 disclosed?
CVE-2026-71193 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71193 actively exploited?
CVE-2026-71193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.6% of all scored CVEs.
What is the CVSS score of CVE-2026-71193?
CVE-2026-71193 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-71193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71193, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-71193

Explore →

Is Your Infrastructure Affected by CVE-2026-71193?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs