InfoSec Signals™
Sign InStart Free
Back to CVE records
Critical 9.1Published May 21, 2026

CVE-2026-42508Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

Updated under an hour ago ()

Does this affect you?

It affects golang.org/x/crypto/ssh/knownhosts and 31 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

CVSS
9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE)
CWE-295
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
Go
NVD analysis
Modified
Record last updated
Sep 15, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
golang.org/x/crypto golang.org/x/crypto/ssh/knownhosts
golang.org_x_crypto:ssh_knownhosts (from the name)
before 0.52.0
CNA record
from 7:5.8.2-4.el10_2 not affected
CISA ADP
from 8060020260803064027.ad008a3a not affected
CISA ADP
from 8060020260803064027.ad008a3a not affected
CISA ADP
from 8080020260721142025.63b34585 not affected
CISA ADP
from 8080020260721142025.63b34585 not affected
CISA ADP
Red Hat RHEM 1.0 for RHEL 9
redhat:edge_manager
from 0:1.0.3-1.el9em not affected
CISA ADP
Red Hat Cluster Observability Operator 1.5.0
redhat:cluster_observability_operator
from 1787593637 not affected
CISA ADP
from 1782401674 not affected
CISA ADP
from 1788439505 not affected
CISA ADP

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

Your cookie choices
We use essential cookies to run this site, and, only with your consent, an advertising cookie from Google to measure whether our ads lead to sign-ups and subscriptions. See our for details.