CVE-2026-81686

MEDIUMNVD 5.56.2▲
EchelonGraph scoreHIGH confidence

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, ghsa, nvd
Trending — 3 sources updated this week
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

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
6.2(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

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
Severity62% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 2, 2026

Advisory Details (2)

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

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 Patch Available

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 rangeFixed inDependents
openssl-encrypt0.2.2 ... 1.4.8 (53 versions)1.4.9—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 72× 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. 2026-09-19 04:16 UTCEG score recompute
  2. 2026-09-19 04:16 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 06:16 UTCEG score recompute
  5. 2026-09-18 06:16 UTCGHSA enrichment
  6. 2026-09-17 08:16 UTCEG score recompute
  7. 2026-09-17 08:16 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 10:16 UTCEG score recompute
  10. 2026-09-16 10:16 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 12:16 UTCEG score recompute
  13. 2026-09-15 12:16 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 14:13 UTCEG score recompute
  17. 2026-09-14 14:13 UTCGHSA enrichment
  18. 2026-09-13 16:13 UTCGHSA enrichment
  19. 2026-09-12 18:12 UTCEG score recompute
  20. 2026-09-12 18:12 UTCGHSA enrichment
  21. 2026-09-11 20:12 UTCEG score recompute
  22. 2026-09-11 20:12 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-10 22:00 UTCEG score recompute
Show 47 more
  1. 2026-09-10 22:00 UTCGHSA enrichment
  2. 2026-09-10 00:00 UTCGHSA enrichment
  3. 2026-09-09 00:41 UTCEG score recompute
  4. 2026-09-09 00:41 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 01:23 UTCGHSA enrichment
  7. 2026-09-07 03:23 UTCEG score recompute
  8. 2026-09-07 03:23 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-06 05:18 UTCEG score recompute
  11. 2026-09-06 05:18 UTCGHSA enrichment
  12. 2026-09-05 15:31 UTCEPSS rescore
  13. 2026-09-05 07:17 UTCEG score recompute
  14. 2026-09-05 07:17 UTCGHSA enrichment
  15. 2026-09-04 09:16 UTCEG score recompute
  16. 2026-09-04 09:16 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 11:16 UTCGHSA enrichment
  19. 2026-09-02 13:13 UTCEG score recompute
  20. 2026-09-02 13:13 UTCGHSA enrichment
  21. 2026-09-02 13:12 UTCNVD updateCVSS v3 → 5.5
  22. 2026-09-02 09:46 UTCEG score recompute
  23. 2026-09-02 09:46 UTCGHSA enrichment
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 11:45 UTCEG score recompute
  26. 2026-09-01 11:45 UTCGHSA enrichment
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-08-31 13:44 UTCEG score recompute
  30. 2026-08-31 13:44 UTCGHSA enrichment
  31. 2026-08-30 19:18 UTCEPSS rescore
  32. 2026-08-30 19:17 UTCEPSS rescore
  33. 2026-08-30 15:20 UTCEG score recompute
  34. 2026-08-30 15:20 UTCGHSA enrichment
  35. 2026-08-30 01:22 UTCEPSS rescore
  36. 2026-08-29 17:20 UTCEG score recompute
  37. 2026-08-29 17:20 UTCGHSA enrichment
  38. 2026-08-28 21:42 UTCEPSS rescore
  39. 2026-08-28 19:03 UTCGHSA enrichment
  40. 2026-08-28 18:28 UTCGHSA enrichment
  41. 2026-08-27 20:27 UTCEG score recompute
  42. 2026-08-27 20:27 UTCGHSA enrichment
  43. 2026-08-27 20:18 UTCEG score recompute
  44. 2026-08-27 20:18 UTCGHSA enrichment
  45. 2026-08-27 17:25 UTCEG score recompute
  46. 2026-08-27 16:47 UTCEG score recompute
  47. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81686?
CVE-2026-81686 is a medium vulnerability 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 disclosed?
CVE-2026-81686 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81686 actively exploited?
CVE-2026-81686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.9% of all 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.
How do I remediate CVE-2026-81686?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81686, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-81686

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