CVE-2026-64193

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-20. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR.

Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option('EXTENDED-ERROR') is called in array context, for example with a payload of {0:""} in EXTRA-TEXT.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
53.7%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 21, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-64193: Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR

http://www.openwall.com/lists/oss-security/2026/07/20/12
generic

Net::DNS

https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
generic

Changes - metacpan.org

https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes

Vendor Advisories for CVE-2026-64193(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 256× in last 7d / 256× 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.

Showing the most recent 100 of 256 total refreshes for this CVE.

  1. 2026-07-23 03:22 UTCEG score recompute
  2. 2026-07-22 23:34 UTCEG score recompute
  3. 2026-07-22 23:34 UTCGHSA enrichment
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-21 19:09 UTCEG score recompute▲ 9.80
  7. 2026-07-21 19:09 UTCGHSA enrichment
  8. 2026-07-21 19:08 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  9. 2026-07-21 15:25 UTCEPSS rescore
  10. 2026-07-21 15:25 UTCEPSS rescore
  11. 2026-07-21 08:40 UTCGHSA enrichment
  12. 2026-07-21 08:38 UTCGHSA enrichment
  13. 2026-07-21 08:24 UTCGHSA enrichment
  14. 2026-07-21 08:13 UTCGHSA enrichment
  15. 2026-07-21 08:03 UTCGHSA enrichment
  16. 2026-07-21 08:03 UTCGHSA enrichment
  17. 2026-07-21 08:00 UTCGHSA enrichment
  18. 2026-07-21 07:57 UTCGHSA enrichment
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  20. 2026-07-21 07:55 UTCGHSA enrichment
  21. 2026-07-21 07:53 UTCGHSA enrichment
  22. 2026-07-21 07:52 UTCGHSA enrichment
  23. 2026-07-21 07:49 UTCGHSA enrichment
  24. 2026-07-21 07:45 UTCGHSA enrichment
  25. 2026-07-21 07:43 UTCGHSA enrichment
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  1. 2026-07-21 07:40 UTCGHSA enrichment
  2. 2026-07-21 07:39 UTCGHSA enrichment
  3. 2026-07-21 07:34 UTCGHSA enrichment
  4. 2026-07-21 07:20 UTCGHSA enrichment
  5. 2026-07-21 07:20 UTCGHSA enrichment
  6. 2026-07-21 07:18 UTCGHSA enrichment
  7. 2026-07-21 07:12 UTCGHSA enrichment
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  9. 2026-07-21 07:00 UTCGHSA enrichment
  10. 2026-07-21 06:55 UTCGHSA enrichment
  11. 2026-07-21 06:50 UTCGHSA enrichment
  12. 2026-07-21 06:41 UTCGHSA enrichment
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  14. 2026-07-21 06:36 UTCGHSA enrichment
  15. 2026-07-21 06:34 UTCGHSA enrichment
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  17. 2026-07-21 06:19 UTCGHSA enrichment
  18. 2026-07-21 06:14 UTCGHSA enrichment
  19. 2026-07-21 06:14 UTCGHSA enrichment
  20. 2026-07-21 06:12 UTCGHSA enrichment
  21. 2026-07-21 06:10 UTCGHSA enrichment
  22. 2026-07-21 06:05 UTCGHSA enrichment
  23. 2026-07-21 06:03 UTCGHSA enrichment
  24. 2026-07-21 05:24 UTCGHSA enrichment
  25. 2026-07-21 05:17 UTCGHSA enrichment
  26. 2026-07-21 05:14 UTCGHSA enrichment
  27. 2026-07-21 05:01 UTCGHSA enrichment
  28. 2026-07-21 05:00 UTCGHSA enrichment
  29. 2026-07-21 04:59 UTCGHSA enrichment
  30. 2026-07-21 04:56 UTCGHSA enrichment
  31. 2026-07-21 04:55 UTCGHSA enrichment
  32. 2026-07-21 04:26 UTCGHSA enrichment
  33. 2026-07-21 04:13 UTCGHSA enrichment
  34. 2026-07-21 04:06 UTCGHSA enrichment
  35. 2026-07-21 04:06 UTCGHSA enrichment
  36. 2026-07-21 04:01 UTCGHSA enrichment
  37. 2026-07-21 03:57 UTCGHSA enrichment
  38. 2026-07-21 03:56 UTCGHSA enrichment
  39. 2026-07-21 03:55 UTCGHSA enrichment
  40. 2026-07-21 03:54 UTCGHSA enrichment
  41. 2026-07-21 03:48 UTCGHSA enrichment
  42. 2026-07-21 03:40 UTCGHSA enrichment
  43. 2026-07-21 03:38 UTCGHSA enrichment
  44. 2026-07-21 03:31 UTCGHSA enrichment
  45. 2026-07-21 03:30 UTCGHSA enrichment
  46. 2026-07-21 03:29 UTCGHSA enrichment
  47. 2026-07-21 03:26 UTCGHSA enrichment
  48. 2026-07-21 03:23 UTCGHSA enrichment
  49. 2026-07-21 03:13 UTCGHSA enrichment
  50. 2026-07-21 03:12 UTCGHSA enrichment
  51. 2026-07-21 03:11 UTCGHSA enrichment
  52. 2026-07-21 03:11 UTCGHSA enrichment
  53. 2026-07-21 03:02 UTCGHSA enrichment
  54. 2026-07-21 02:56 UTCGHSA enrichment
  55. 2026-07-21 02:55 UTCGHSA enrichment
  56. 2026-07-21 02:55 UTCGHSA enrichment
  57. 2026-07-21 02:31 UTCGHSA enrichment
  58. 2026-07-21 02:28 UTCGHSA enrichment
  59. 2026-07-21 02:26 UTCGHSA enrichment
  60. 2026-07-21 02:26 UTCGHSA enrichment
  61. 2026-07-21 02:24 UTCGHSA enrichment
  62. 2026-07-21 02:22 UTCGHSA enrichment
  63. 2026-07-21 02:18 UTCGHSA enrichment
  64. 2026-07-21 02:14 UTCGHSA enrichment
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  66. 2026-07-21 02:08 UTCGHSA enrichment
  67. 2026-07-21 02:05 UTCGHSA enrichment
  68. 2026-07-21 02:04 UTCGHSA enrichment
  69. 2026-07-21 01:51 UTCGHSA enrichment
  70. 2026-07-21 01:43 UTCGHSA enrichment
  71. 2026-07-21 01:39 UTCGHSA enrichment
  72. 2026-07-21 01:38 UTCGHSA enrichment
  73. 2026-07-21 01:30 UTCGHSA enrichment
  74. 2026-07-21 01:25 UTCGHSA enrichment
  75. 2026-07-21 01:19 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-64193?
CVE-2026-64193 is a critical vulnerability published on July 20, 2026. Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR. Net::DNS::RR::OPT::EXTENDEDERROR::decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some…
When was CVE-2026-64193 disclosed?
CVE-2026-64193 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64193 actively exploited?
CVE-2026-64193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-64193?
CVE-2026-64193 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64193, 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.

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