7.5

CVE-2026-106553: openbsd openssh

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-106553DEBIAN-CVE-2026-106553
Published 06-10-2026Last modified 07-10-2026
Open JSON

Vulnerability summary

CVE-2026-106553 is a high (CVSS 7.5) vulnerability in openbsd openssh. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 2
MGASA-2026-0521RHSA-2026:84849USN-8928-1USN-8937-1

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 07-10-2026
    Last modifiedVulnerability information updated.

Description

In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202620-10-2026
EPSS score
0.14%

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

Ubuntu3 products
  • opensshAll versions (No fix recorded) | < 1:8.9p1-3ubuntu0.18 | < 1:9.6p1-3ubuntu13.20 | < 1:10.5p1-1ubuntu3.1 | < 1:10.2p1-2ubuntu3.8
  • openssh-gssapiAll versions (No fix recorded) | < 1:10.5p1-1ubuntu3.1
  • openssh-ssh1All versions (No fix recorded)
Debian2 products
  • opensshAll versions (No fix recorded) | < 1:10.6p1-1
  • openssh-gssapiAll versions (No fix recorded) | < 1:10.6p1-1
Openbsd1 product

3 vendors · 6 products

References

6 links