CVE-2026-56862

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 13, 2026

Last Modified

September 3, 2026

Advisory Details (4)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

GO-2026-6090 - Go Packages

https://pkg.go.dev/vuln/GO-2026-6090
generic
https://groups.google.com/g/golang-announce/c/94pEornpRlI
generic
https://go.dev/cl/804261
generic

crypto/tls: handshake messages can bypass non-advancing record limit in TLS 1.3 · Issue #80528 · golang/go · GitHub

https://go.dev/issue/80528

Vendor Advisories for CVE-2026-56862(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatosbuild-composer-0:75-10.el8_82026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_42026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_62026-09-16redhat
redhatcryostat/cryostat-storage-rhel9:4.2.0-222026-09-16redhat
redhatflightctl-0:1.2.1-1.el92026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_02026-09-16redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatgrafana-0:10.2.6-23.el9_62026-09-15redhat
redhatopenshift-0:4.20.0-202609041738.p2.g4012064.assembly.stream.el82026-09-15redhat
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatopenshift-0:4.22.0-202609021800.p2.g19365a0.assembly.stream.el82026-09-15redhat
redhatose-crio-credential-provider-0:4.21.0-202609021357.p2.g83d4961.assembly.stream.el102026-09-15redhat
redhatgit-lfs-0:3.6.1-2.el10_0.72026-09-14redhat
redhatdelve-0:1.26.1-1.el9_6.12026-09-14redhat
redhatgrafana-pcp-0:5.1.1-5.el9_2.22026-09-14redhat
redhatgit-lfs-0:3.2.0-2.el9_2.102026-09-14redhat
redhatgit-lfs-0:3.4.1-13.el8_102026-09-14redhat
redhatgit-lfs-0:3.6.1-2.el9_6.72026-09-14redhat
redhatgrafana-pcp-0:5.1.1-9.el9_42026-09-14redhat
redhatdelve-0:1.26.1-1.el9_4.12026-09-14redhat
redhatrhc-worker-playbook-0:0.2.10-2.el10_22026-09-14redhat
redhatdelve-0:1.26.1-1.el9_2.12026-09-14redhat
redhatgrafana-pcp-0:5.1.1-15.el9_6.12026-09-14redhat
redhatgrafana-pcp-0:5.3.0-1.el10_0.12026-09-11redhat
redhatopenshift-logging/eventrouter-rhel9:17883757962026-09-10redhat
redhatosbuild-composer-0:134.1-12.el10_02026-09-10redhat
redhatexternal-secrets-operator/external-secrets-rhel9:17889639292026-09-10redhat
redhatquay/quay-rhel8:17885943762026-09-10redhat
redhatgit-lfs-0:3.7.1-4.el9_8.32026-09-10redhat
redhatquay/quay-rhel8:17885618412026-09-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 4 ecosystems)
Debian:14(3)
PackageVulnerable rangeFixed inDependents
golang-1.251.25.0-1 ... 1.25.9-1 (20 versions)——
golang-1.261.26.0-1 ... 1.26~rc3-2 (16 versions)1.26.6-1—
golang-1.271.27~rc1-1, 1.27~rc2-11.27~rc3-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-1.191.19.10-1 ... 1.19.9-1 (12 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-1.241.24.12-1 ... 1.24.9-1 (10 versions)——
Go(1)
PackageVulnerable rangeFixed inDependents
stdlib—1.27.0-rc.3—

Weakness Classification(1)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 42× in last 7d / 172× 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 209 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56862?
CVE-2026-56862 is a high vulnerability published on August 13, 2026. Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
When was CVE-2026-56862 disclosed?
CVE-2026-56862 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56862 actively exploited?
CVE-2026-56862 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.2% of all scored CVEs.
What is the CVSS score of CVE-2026-56862?
CVE-2026-56862 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-56862?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56862, 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-2026-56862

Explore →

Is Your Infrastructure Affected by CVE-2026-56862?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs