CVE-2026-12205

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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

Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery.

Crypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it.

The first sign() on a Key object picks a nonce, and every later sign() on that same object reuses it, producing an identical "r".

Keys used to sign more than once with an affected version should be considered compromised.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
46
EG Risk 46/100

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
Severity91% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.3%
EPSS %ILE
19th
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (3)

Auto-updated Aug 1, 2026
No fix on record yet.
generic

oss-security - CVE-2026-12205: Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery

http://www.openwall.com/lists/oss-security/2026/06/15/4
generic

Changes - metacpan.org

https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes
generic

lib/Crypt/DSA.pm - metacpan.org

https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47

Vendor Advisories for CVE-2026-12205(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libcrypt-dsa-perl1.17-4, 1.17-5, 1.19-1, 1.20-1, 1.21-1
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libcrypt-dsa-perl1.17-5, 1.19-1, 1.20-1, 1.21-1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libcrypt-dsa-perl1.19-1, 1.20-1, 1.21-1
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 25× 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 410 total refreshes for this CVE.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-08 17:11 UTCEPSS rescore
  3. 2026-10-07 23:47 UTCEPSS rescore
  4. 2026-10-06 15:17 UTCEPSS rescore
  5. 2026-10-05 17:42 UTCEPSS rescore
  6. 2026-10-04 23:21 UTCEPSS rescore
  7. 2026-10-03 17:21 UTCOSV refresh
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-29 15:20 UTCEPSS rescore
  12. 2026-09-28 13:50 UTCEPSS rescore
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-23 13:47 UTCEPSS rescore
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-18 19:27 UTCEPSS rescore
  17. 2026-09-16 05:14 UTCEPSS rescore
  18. 2026-09-14 07:51 UTCGHSA enrichment
  19. 2026-09-14 03:36 UTCEG score recompute
  20. 2026-09-14 03:36 UTCGHSA enrichment
  21. 2026-09-13 16:46 UTCEPSS rescore
  22. 2026-09-12 15:00 UTCEPSS rescore
  23. 2026-09-11 14:52 UTCEPSS rescore
  24. 2026-09-11 09:36 UTCEPSS rescore
  25. 2026-09-10 09:34 UTCEPSS rescore
Show 75 more
  1. 2026-09-08 22:00 UTCEPSS rescore
  2. 2026-09-07 16:01 UTCEPSS rescore
  3. 2026-09-06 13:47 UTCEPSS rescore
  4. 2026-09-04 05:06 UTCEPSS rescore
  5. 2026-09-02 14:11 UTCEPSS rescore
  6. 2026-09-01 13:53 UTCEPSS rescore
  7. 2026-09-01 04:39 UTCEPSS rescore
  8. 2026-08-30 22:52 UTCEG score recompute
  9. 2026-08-30 22:52 UTCGHSA enrichment
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 01:21 UTCEPSS rescore
  12. 2026-08-28 21:40 UTCEPSS rescore
  13. 2026-08-25 13:48 UTCEPSS rescore
  14. 2026-08-25 03:39 UTCGHSA enrichment
  15. 2026-08-24 23:27 UTCEG score recompute
  16. 2026-08-24 23:27 UTCGHSA enrichment
  17. 2026-08-23 22:26 UTCGHSA enrichment
  18. 2026-08-23 17:53 UTCGHSA enrichment
  19. 2026-08-23 13:42 UTCGHSA enrichment
  20. 2026-08-23 09:31 UTCEG score recompute
  21. 2026-08-23 09:30 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:48 UTCEPSS rescore
  24. 2026-08-21 23:32 UTCGHSA enrichment
  25. 2026-08-21 18:52 UTCGHSA enrichment
  26. 2026-08-21 14:30 UTCGHSA enrichment
  27. 2026-08-21 10:06 UTCGHSA enrichment
  28. 2026-08-21 05:54 UTCGHSA enrichment
  29. 2026-08-21 00:43 UTCEG score recompute
  30. 2026-08-21 00:43 UTCGHSA enrichment
  31. 2026-08-20 22:55 UTCEPSS rescore
  32. 2026-08-20 20:31 UTCGHSA enrichment
  33. 2026-08-20 16:19 UTCGHSA enrichment
  34. 2026-08-20 08:35 UTCEG score recompute
  35. 2026-08-20 08:35 UTCGHSA enrichment
  36. 2026-08-19 17:03 UTCEPSS rescore
  37. 2026-08-19 13:10 UTCEG score recompute
  38. 2026-08-19 13:10 UTCGHSA enrichment
  39. 2026-08-18 13:48 UTCEPSS rescore
  40. 2026-08-17 15:05 UTCEG score recompute
  41. 2026-08-17 15:05 UTCGHSA enrichment
  42. 2026-08-17 10:49 UTCGHSA enrichment
  43. 2026-08-17 06:38 UTCGHSA enrichment
  44. 2026-08-17 02:18 UTCGHSA enrichment
  45. 2026-08-16 22:06 UTCGHSA enrichment
  46. 2026-08-16 15:37 UTCEG score recompute
  47. 2026-08-16 15:37 UTCGHSA enrichment
  48. 2026-08-16 14:56 UTCEPSS rescore
  49. 2026-08-16 11:25 UTCGHSA enrichment
  50. 2026-08-16 07:14 UTCGHSA enrichment
  51. 2026-08-16 03:03 UTCEG score recompute
  52. 2026-08-16 03:03 UTCGHSA enrichment
  53. 2026-08-16 02:14 UTCEPSS rescore
  54. 2026-08-15 22:52 UTCGHSA enrichment
  55. 2026-08-15 18:34 UTCGHSA enrichment
  56. 2026-08-15 14:22 UTCGHSA enrichment
  57. 2026-08-15 10:10 UTCGHSA enrichment
  58. 2026-08-15 02:19 UTCEG score recompute
  59. 2026-08-15 02:19 UTCGHSA enrichment
  60. 2026-08-15 01:30 UTCEPSS rescore
  61. 2026-08-14 22:08 UTCGHSA enrichment
  62. 2026-08-14 17:54 UTCGHSA enrichment
  63. 2026-08-14 13:19 UTCGHSA enrichment
  64. 2026-08-14 09:08 UTCGHSA enrichment
  65. 2026-08-14 04:56 UTCGHSA enrichment
  66. 2026-08-14 00:45 UTCEG score recompute
  67. 2026-08-14 00:45 UTCGHSA enrichment
  68. 2026-08-13 22:00 UTCEPSS rescore
  69. 2026-08-13 20:33 UTCGHSA enrichment
  70. 2026-08-13 14:43 UTCGHSA enrichment
  71. 2026-08-13 10:31 UTCGHSA enrichment
  72. 2026-08-13 06:19 UTCGHSA enrichment
  73. 2026-08-13 02:08 UTCGHSA enrichment
  74. 2026-08-12 21:57 UTCGHSA enrichment
  75. 2026-08-12 17:45 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-12205?
CVE-2026-12205 is a critical vulnerability published on June 15, 2026. Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery. Crypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it. The first sign() on a Key object picks a nonce, and every later sign() on that same…
When was CVE-2026-12205 disclosed?
CVE-2026-12205 was first published on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12205 actively exploited?
CVE-2026-12205 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12205?
CVE-2026-12205 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12205?
No fix for CVE-2026-12205 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-12205 are linked in the Vendor Advisories panel on this page.

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