7.5

CVE-2026-78662: golang crypto

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-78662DEBIAN-CVE-2026-78662CGA-226g-v584-2jvc
Published 02-09-2026Last modified 03-09-2026
Open JSON

Vulnerability summary

CVE-2026-78662 is a high (CVSS 7.5) vulnerability in golang crypto. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.43%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 44 · Related 45
OPENSUSE-SU-2026:11727-1OPENSUSE-SU-2026:21801-1OPENSUSE-SU-2026:21812-1OPENSUSE-SU-2026:21814-1OPENSUSE-SU-2026:21816-1OPENSUSE-SU-2026:21824-1

Timeline

  1. 02-09-2026
    PublishedVulnerability first disclosed.
  2. 03-09-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

+0.12 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard200 products
  • aactl< 0.4.12-r75
  • acm-controllerAll versions (No fix recorded)
  • acm-controller-fipsAll versions (No fix recorded)
  • act< 0.2.89-r10
  • actions-runner-controllerAll versions (No fix recorded)

1 vendor · 200 products · Showing 200 of 4047. Use Open JSON for the complete list.

References

10 links