CVE-2026-95831

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: 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::SelfCertificate versions from 1.01 through 1.05 for Perl contains malware which executes Python code from an obfuscated URL.

The generate_certificate runs a Python script saved as a certificate file. The pyhton script attempts to retrieve code from a hardcoded http URL that is obfuscated with base64 encoding and run the response body directly.

The impact is that arbitrary code can be invoked as the user, without a dropped script being saved on the affected host.

The releases have no test scripts nor build hooks. The intention may have been to trigger the payload after installation.

For version 1.01, the dropper script is in lib/Crypt/SelfCertificate/sample/validate.p12.

For version 1.05, the dropper script is in lib/Crypt/SelfCertificate/sample/cert7.pem.

The SHA-256 digests of the files are

fbff21f45ff748365062a5e36fb2d72558cad82a507a6f357f320b4fcdf07760 Crypt-SelfCertificate-1.01.tar.gz 27b2d2d3174ad771474fff2521f5084ec231e9218ea8c832515aef1cbd5897bc lib/Crypt/SelfCertificate/sample/validate.p12

9fdfa7d69b034b77d4510cda567e8da1e486ca81c7daaadc5732a45c41d71991 Crypt-SelfCertificate-1.05.tar.gz 27b2d2d3174ad771474fff2521f5084ec231e9218ea8c832515aef1cbd5897bc lib/Crypt/SelfCertificate/sample/cert7.pem

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (1)

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

Crypt::SelfCertificate contains malware - nntp.perl.org

https://www.nntp.perl.org/group/perl.cpan.testers.discuss/2026/09/msg4754.html

Vendor Advisories for CVE-2026-95831(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 30× in last 7d / 60× 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. 2026-10-05 09:21 UTCEG score recompute
  2. 2026-10-05 09:21 UTCGHSA enrichment
  3. 2026-10-04 23:23 UTCEPSS rescore
  4. 2026-10-04 22:10 UTCGHSA enrichment
  5. 2026-10-04 10:58 UTCGHSA enrichment
  6. 2026-10-03 23:47 UTCEG score recompute
  7. 2026-10-03 23:47 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 12:35 UTCGHSA enrichment
  10. 2026-10-03 01:23 UTCEG score recompute
  11. 2026-10-03 01:23 UTCGHSA enrichment
  12. 2026-10-02 17:57 UTCEPSS rescore
  13. 2026-10-02 14:08 UTCGHSA enrichment
  14. 2026-10-02 02:56 UTCEG score recompute
  15. 2026-10-02 02:56 UTCGHSA enrichment
  16. 2026-10-01 19:51 UTCEPSS rescore
  17. 2026-10-01 15:37 UTCGHSA enrichment
  18. 2026-10-01 04:26 UTCGHSA enrichment
  19. 2026-09-30 17:15 UTCEG score recompute
  20. 2026-09-30 17:15 UTCGHSA enrichment
  21. 2026-09-30 15:04 UTCEPSS rescore
  22. 2026-09-30 06:04 UTCGHSA enrichment
  23. 2026-09-29 18:52 UTCEG score recompute
  24. 2026-09-29 18:52 UTCGHSA enrichment
  25. 2026-09-29 07:37 UTCEG score recompute
Show 35 more
  1. 2026-09-29 07:37 UTCGHSA enrichment
  2. 2026-09-28 20:26 UTCEG score recompute
  3. 2026-09-28 20:26 UTCGHSA enrichment
  4. 2026-09-28 13:52 UTCEPSS rescore
  5. 2026-09-28 13:52 UTCEPSS rescore
  6. 2026-09-28 09:15 UTCGHSA enrichment
  7. 2026-09-27 22:05 UTCEG score recompute
  8. 2026-09-27 22:05 UTCGHSA enrichment
  9. 2026-09-27 13:49 UTCEPSS rescore
  10. 2026-09-27 10:52 UTCGHSA enrichment
  11. 2026-09-26 23:42 UTCEG score recompute
  12. 2026-09-26 23:42 UTCGHSA enrichment
  13. 2026-09-26 15:59 UTCEPSS rescore
  14. 2026-09-26 12:30 UTCGHSA enrichment
  15. 2026-09-26 01:19 UTCEG score recompute
  16. 2026-09-26 01:19 UTCGHSA enrichment
  17. 2026-09-25 14:08 UTCGHSA enrichment
  18. 2026-09-25 02:54 UTCGHSA enrichment
  19. 2026-09-24 15:42 UTCEG score recompute
  20. 2026-09-24 15:42 UTCGHSA enrichment
  21. 2026-09-24 14:04 UTCEPSS rescore
  22. 2026-09-24 04:31 UTCEG score recompute
  23. 2026-09-24 04:31 UTCGHSA enrichment
  24. 2026-09-23 17:54 UTCEPSS rescore
  25. 2026-09-23 17:19 UTCGHSA enrichment
  26. 2026-09-23 16:24 UTCGHSA enrichment
  27. 2026-09-23 14:29 UTCGHSA enrichment
  28. 2026-09-23 03:18 UTCGHSA enrichment
  29. 2026-09-22 21:33 UTCEG score recompute
  30. 2026-09-22 21:33 UTCGHSA enrichment
  31. 2026-09-22 20:23 UTCEG score recompute▲ 7.80
  32. 2026-09-22 20:22 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  33. 2026-09-22 19:36 UTCNVD update
  34. 2026-09-22 18:33 UTCEG score recompute
  35. 2026-09-22 18:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-95831?
CVE-2026-95831 is a high vulnerability published on September 22, 2026. Crypt::SelfCertificate versions from 1.01 through 1.05 for Perl contains malware which executes Python code from an obfuscated URL. The generate_certificate runs a Python script saved as a certificate file. The pyhton script attempts to retrieve code from a hardcoded http URL that is obfuscated…
When was CVE-2026-95831 disclosed?
CVE-2026-95831 was first published on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-95831 actively exploited?
CVE-2026-95831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-95831?
CVE-2026-95831 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-95831?
No fix for CVE-2026-95831 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-2026-95831 are linked in the Vendor Advisories panel on this page.

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