CVE-2026-57826

CRITICALPre-NVD 6.89.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.8; sources differ by 3.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in openHiTLS 0.2.0 through 0.3.2. In the X.509 certificate chain verification, the basic constraints extension and CA flag processing of intermediate CAs are only verified for v3 certificates, and v1/v2 certificates are ignored.

CVSS v3
6.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100CISA 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

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

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

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

August 18, 2026

Last Modified

August 31, 2026

Advisory Details (6)

Auto-updated Aug 26, 2026
Patch available. Sources: github_commit.
generic

HTLS-2026-001

https://www.openhitls.net/zh/support/HTLS-2026-001.html
generic

Comparing openhitls-0.3.2...openhitls-0.3.3 · openHiTLS/openHiTLS · GitHub

https://github.com/openHiTLS/openHiTLS/compare/openhitls-0.3.2...openhitls-0.3.3
github_commit Patch Available

commit 4355cdf5b043 (openHiTLS/openHiTLS)

Patch available: openHiTLS/openHiTLS openhitls-0.3.3 (contains commit 4355cdf5b043)

https://github.com/openHiTLS/openHiTLS/commit/4355cdf5b043d5b9ef698f8f57860f77f8e92561
github_commit

commit 2d3b221d113b (openHiTLS/openHiTLS)

Fix landed in openHiTLS/openHiTLS commit 2d3b221d113b — awaiting tagged release

https://github.com/openHiTLS/openHiTLS/commit/2d3b221d113b452bc197012b185978b8314ee8a4
generic

AtomGit - 全球开发者的开源社区,开源代码托管平台

https://gitcode.com/openHiTLS/openhitls/pull/1657
generic

AtomGit - 全球开发者的开源社区,开源代码托管平台

https://gitcode.com/openHiTLS/openhitls/pull/1399

Vendor Advisories for CVE-2026-57826(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 37× in last 7d / 183× 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 314 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57826?
CVE-2026-57826 is a critical vulnerability published on August 18, 2026. An issue was discovered in openHiTLS 0.2.0 through 0.3.2. In the X.509 certificate chain verification, the basic constraints extension and CA flag processing of intermediate CAs are only verified for v3 certificates, and v1/v2 certificates are ignored.
When was CVE-2026-57826 disclosed?
CVE-2026-57826 was first published on August 18, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57826 actively exploited?
CVE-2026-57826 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57826?
CVE-2026-57826 has a CVSS v3.1 base score of 6.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8 (CRITICAL).
How do I remediate CVE-2026-57826?
A fix for CVE-2026-57826 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-57826 are linked in the Vendor Advisories panel on this page.

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