CVE-2026-8721

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs.

Password parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen. The Perl length is discarded.

The C code (or OpenSSL internally) calls strlen() on the buffer. Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.6%
EPSS %ILE
44th
KEV
Not listed

Published

May 17, 2026

Last Modified

May 18, 2026

Advisory Details (2)

Auto-updated Oct 8, 2026
Patch available.
generic

oss-security - CVE-2026-8721: Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs

http://www.openwall.com/lists/oss-security/2026/05/17/6
generic

Client Challenge

https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.95/view/Changes.md

Vendor Advisories for CVE-2026-8721(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-openssl-pkcs12-perl1.3-1 ... 1.97-1 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libcrypt-openssl-pkcs12-perl1.94-1 ... 1.99-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libcrypt-openssl-pkcs12-perl1.94-1
  • every version up to 1.95-1: fixed in 1.95-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 354 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Same product

3 shown

Debian:11:libcrypt-openssl-pkcs12-perl · Debian:13:libcrypt-openssl-pkcs12-perl

Frequently asked(5)

What is CVE-2026-8721?
CVE-2026-8721 is a critical vulnerability published on May 17, 2026. Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs. Password parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen. The Perl length is discarded. The C code (or OpenSSL internally) calls strlen() on the…
When was CVE-2026-8721 disclosed?
CVE-2026-8721 was first published on May 17, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8721 actively exploited?
CVE-2026-8721 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8721?
CVE-2026-8721 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-8721?
A fix for CVE-2026-8721 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-8721 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-8721

Explore →

Is Your Infrastructure Affected by CVE-2026-8721?

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

Book a Demo →Browse All CVEs