CVE-2026-78662

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cisa-adp, epss
Trending — 3 sources updated 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: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 4, 2026

Advisory Details (4)

Auto-updated Sep 3, 2026
No patch confirmed yet.
generic

GO-2026-6354 - Go Packages

https://pkg.go.dev/vuln/GO-2026-6354
generic
https://groups.google.com/g/golang-announce/c/1y3fb2np35U
generic
https://go.dev/cl/826504
generic

x/crypto/ssh: prevent DoS on deadlocked undecided channel · Issue #81316 · golang/go · GitHub

https://go.dev/issue/81316

Vendor Advisories for CVE-2026-78662(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-go.crypto1:0.10.0-1 ... 1:0.56.0-1 (36 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-go.crypto1:0.25.0-1 ... 1:0.56.0-1 (21 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-go.crypto1:0.25.0-1 ... 1:0.55.0-1 (20 versions)1:0.56.0-1—
Go(1)
PackageVulnerable rangeFixed inDependents
golang.org/x/crypto—0.56.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 49× 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 07:13 UTCEG score recompute
  2. 2026-09-19 07:13 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 18:18 UTCVendor advisory
  5. 2026-09-18 05:05 UTCEG score recompute
  6. 2026-09-18 05:05 UTCVendor advisory
  7. 2026-09-17 16:10 UTCVendor advisory
  8. 2026-09-17 03:15 UTCVendor advisory
  9. 2026-09-16 14:20 UTCEG score recompute
  10. 2026-09-16 14:20 UTCVendor advisory
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 01:24 UTCVendor advisory
  14. 2026-09-15 12:28 UTCEG score recompute
  15. 2026-09-15 12:28 UTCVendor advisory
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 23:33 UTCVendor advisory
  19. 2026-09-14 10:04 UTCVendor advisory
  20. 2026-09-13 21:09 UTCEG score recompute
  21. 2026-09-13 21:09 UTCVendor advisory
  22. 2026-09-13 08:13 UTCVendor advisory
  23. 2026-09-12 19:18 UTCEG score recompute
  24. 2026-09-12 19:18 UTCVendor advisory
  25. 2026-09-12 06:22 UTCVendor advisory
Show 24 more
  1. 2026-09-11 17:26 UTCEG score recompute
  2. 2026-09-11 17:26 UTCVendor advisory
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-10 15:35 UTCEG score recompute
  6. 2026-09-09 13:44 UTCVendor advisory
  7. 2026-09-09 00:24 UTCEG score recompute
  8. 2026-09-09 00:24 UTCVendor advisory
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-08 11:16 UTCVendor advisory
  11. 2026-09-07 22:20 UTCVendor advisory
  12. 2026-09-07 09:24 UTCVendor advisory
  13. 2026-09-06 20:26 UTCEG score recompute
  14. 2026-09-06 20:26 UTCVendor advisory
  15. 2026-09-06 13:48 UTCEPSS rescore
  16. 2026-09-05 18:34 UTCEG score recompute
  17. 2026-09-04 16:43 UTCEG score recompute
  18. 2026-09-04 05:51 UTCEG score recompute
  19. 2026-09-04 05:07 UTCEPSS rescore
  20. 2026-09-03 13:25 UTCEG score recompute▲ 7.50
  21. 2026-09-03 13:23 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  22. 2026-09-02 20:19 UTCNVD update
  23. 2026-09-02 19:46 UTCEG score recompute
  24. 2026-09-02 19:45 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-78662?
CVE-2026-78662 is a high vulnerability published on September 2, 2026. Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time,…
When was CVE-2026-78662 disclosed?
CVE-2026-78662 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78662 actively exploited?
CVE-2026-78662 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 75.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78662?
CVE-2026-78662 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78662?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78662, 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

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