CVE-2026-81717

LOWPre-NVD 3.53.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 3.5 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. The CNA's CVSS baseline 3.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
3.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 3.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two weaknesses in the portable USB drive feature, whose threat model treats the removable drive as untrusted (attacker with physical write access). USBDriveCreator._verify_integrity_file only validates files listed in the manifest, so files added to the drive — including a root-level autorun payload — are not detected and integrity verification still passes. Additionally, a globally constant, source-embedded KDF salt (_LEGACY_FIXED_SALT) is used to derive the drive encryption key for any drive lacking a per-drive salt file, defeating precomputation resistance and enabling an offline rainbow-table attack.

CVSS v3
3.5
EG Score
3.5LOWmedium confidence
EG Risk
16
EG Risk 16/100

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 (value × EchelonGraph’s weight)
Severity35% × 45%
The EG Score, 3.5 of 10.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 27, 2026

Last Modified

October 1, 2026

References (2)

Vendor Advisories for CVE-2026-81717(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
openssl-encrypt0.2.2 ... 1.4.8 (53 versions)
  • every version up to 1.4.9: fixed in 1.4.9
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 72 are merged into the row they repeat.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-12 14:56 UTCEG score recompute
  4. 2026-10-11 19:20 UTCEG score recompute
  5. 2026-10-11 16:36 UTCEG score recompute
  6. 2026-10-11 13:54 UTCEG score recompute
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-08 01:19 UTCEG score recompute
  11. 2026-10-08 01:19 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-04 14:37 UTCEG score recompute
  17. 2026-10-04 14:37 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-01 15:27 UTCEG score recompute
  22. 2026-10-01 15:27 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  23. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-30 05:00 UTCEG score recompute
  25. 2026-09-30 05:00 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
Show 44 more
  1. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-09-26 18:43 UTCEG score recompute
  3. 2026-09-26 18:43 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  4. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-09-23 17:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  7. 2026-09-23 04:17 UTCEG score recompute
  8. 2026-09-23 04:17 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  9. 2026-09-22 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  10. 2026-09-20 05:42 UTCEG score recompute
  11. 2026-09-20 05:42 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  12. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  13. 2026-09-17 07:07 UTCEG score recompute
  14. 2026-09-17 07:07 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  15. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  17. 2026-09-15 03:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  18. 2026-09-14 08:31 UTCEG score recompute
  19. 2026-09-14 08:31 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  20. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  21. 2026-09-11 09:56 UTCEG score recompute
  22. 2026-09-11 09:56 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  23. 2026-09-08 22:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  24. 2026-09-08 11:21 UTCEG score recompute
  25. 2026-09-08 11:21 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  26. 2026-09-06 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  27. 2026-09-05 15:31 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  28. 2026-09-05 12:13 UTCEG score recompute
  29. 2026-09-05 12:13 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  30. 2026-09-04 05:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  31. 2026-09-02 13:35 UTCEG score recompute
  32. 2026-09-02 13:35 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  33. 2026-09-01 13:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  34. 2026-09-01 04:40 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  35. 2026-08-31 17:41 UTCEG score recompute
  36. 2026-08-31 17:41 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  37. 2026-08-30 01:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  38. 2026-08-28 21:42 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  39. 2026-08-28 19:03 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  40. 2026-08-27 20:27 UTCEG score recompute
  41. 2026-08-27 20:27 UTCGHSA enrichmentGHSA-4pgx-8hjp-cmmq · GitHub severity CRITICAL · GitHub CVSS 3.5
  42. 2026-08-27 17:24 UTCEG score recompute
  43. 2026-08-27 16:47 UTCEG score recomputeFirst assessed: 3.5 LOW
  44. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-81717?
CVE-2026-81717 is a low-severity vulnerability; its CVE record was published on August 27, 2026. opensslencrypt (pip package openssl-encrypt) before 1.4.9 contains two weaknesses in the portable USB drive feature, whose threat model treats the removable drive as untrusted (attacker with physical write access). USBDriveCreator.verifyintegrityfile only validates files listed in the manifest, so…
When was CVE-2026-81717 made public?
CVE-2026-81717 was made public on August 12, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 27, 2026. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-81717 actively exploited?
CVE-2026-81717 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-2026-81717?
CVE-2026-81717 has a CVSS base score of 3.5 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-81717?
A fix for CVE-2026-81717 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-81717 are linked in the Vendor Advisories panel on this page.

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