CVE-2026-81686

MEDIUMNVD 5.56.2
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 6.2 from GitHub Security Advisory published 2026-08-27. NVD baseline CVSS 5.5; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
6.2EG
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: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openssl_encrypt 1.4.x before 1.4.9 contains an optional D-Bus crypto service whose org.freedesktop.DBus.Properties.Set method performs neither a polkit authorization check nor value validation. Any local user on the system bus can call Set without authorization and set MaxConcurrentOperations (to 0/negative, causing the concurrency gate to refuse all subsequent operations, or to a huge value removing the limit) or the unbounded DefaultTimeout, resulting in a persistent denial of service of the root daemon. The D-Bus service exists only on the 1.4.x line and was removed in 1.5.x.

CVSS v3
5.5
EG Score
6.2MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity62% × 45%
The EG Score, 6.2 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
2nd
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

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available. Sources: github.
Web page

openssl_encrypt before 1.4.9 D-Bus Properties Authorization Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-d-bus-properties-authorization-bypass
GitHub advisoryMentions a patch (unverified)

D-Bus Properties.Set lacks caller authorization and value validation, letting any local user DoS the crypto service · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-7fhx-8rmv-qjj3

Vendor Advisories for CVE-2026-81686(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 17× in last 7d / 81× 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.

Showing the most recent 98 of 135 refreshes on record for this CVE.

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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 37 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd 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. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-10 01:55 UTCEG score recompute
  10. 2026-10-10 01:55 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-09 03:25 UTCEG score recompute
  13. 2026-10-09 03:24 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-08 05:24 UTCEG score recompute
  16. 2026-10-08 05:24 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-07 07:23 UTCEG score recompute
  19. 2026-10-07 07:23 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-06 09:23 UTCEG score recompute
  22. 2026-10-06 09:23 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-05 11:23 UTCEG score recompute
  25. 2026-10-05 11:23 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
Show 73 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-04 13:22 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  3. 2026-10-03 15:13 UTCEG score recompute
  4. 2026-10-03 15:13 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  5. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-02 13:31 UTCEG score recompute
  8. 2026-10-02 13:31 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  9. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-01 15:28 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  11. 2026-10-01 09:37 UTCEG score recompute
  12. 2026-10-01 09:36 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  13. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-09-30 11:34 UTCEG score recompute
  15. 2026-09-30 11:34 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  16. 2026-09-29 12:47 UTCEG score recompute
  17. 2026-09-29 12:47 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  18. 2026-09-28 14:47 UTCEG score recompute
  19. 2026-09-28 14:47 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  20. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-27 16:44 UTCEG score recompute
  22. 2026-09-27 16:44 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-26 18:44 UTCEG score recompute
  25. 2026-09-26 18:44 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  26. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-09-25 16:46 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  28. 2026-09-24 18:46 UTCEG score recompute
  29. 2026-09-24 18:46 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  30. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-23 19:54 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  32. 2026-09-22 20:19 UTCEG score recompute
  33. 2026-09-22 20:19 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  34. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-09-21 22:19 UTCEG score recompute
  36. 2026-09-21 22:19 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  37. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-09-21 00:17 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  39. 2026-09-20 02:16 UTCEG score recompute
  40. 2026-09-20 02:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  41. 2026-09-19 04:16 UTCEG score recompute
  42. 2026-09-19 04:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  43. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-09-18 06:16 UTCEG score recompute
  45. 2026-09-18 06:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  46. 2026-09-17 08:16 UTCEG score recompute
  47. 2026-09-17 08:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  48. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  49. 2026-09-16 10:16 UTCEG score recompute
  50. 2026-09-16 10:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  51. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  52. 2026-09-15 12:16 UTCEG score recompute
  53. 2026-09-15 12:16 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  54. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  55. 2026-09-14 14:13 UTCEG score recompute
  56. 2026-09-14 14:13 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  57. 2026-09-13 16:13 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  58. 2026-09-12 18:12 UTCEG score recompute
  59. 2026-09-12 18:12 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  60. 2026-09-11 20:12 UTCEG score recompute
  61. 2026-09-11 20:12 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  62. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  63. 2026-09-10 22:00 UTCEG score recompute
  64. 2026-09-10 22:00 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  65. 2026-09-10 00:00 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  66. 2026-09-09 00:41 UTCEG score recompute
  67. 2026-09-09 00:41 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  68. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-09-08 01:23 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  70. 2026-09-07 03:23 UTCEG score recompute
  71. 2026-09-07 03:23 UTCGHSA enrichmentGHSA-jgvp-mwh2-v4m7 · GitHub CVSS 6.2
  72. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  73. 2026-09-06 05:18 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-81686?
CVE-2026-81686 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. openssl_encrypt 1.4.x before 1.4.9 contains an optional D-Bus crypto service whose org.freedesktop.DBus.Properties.Set method performs neither a polkit authorization check nor value validation. Any local user on the system bus can call Set without authorization and set MaxConcurrentOperations (to…
When was CVE-2026-81686 made public?
CVE-2026-81686 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-2026-81686 actively exploited?
CVE-2026-81686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81686?
CVE-2026-81686 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.2 (MEDIUM).
How do I remediate CVE-2026-81686?
A fix for CVE-2026-81686 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-81686 are linked in the Vendor Advisories panel on this page.

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