9.8

CVE-2026-10027: IBM MQ queue manager is vulnerable to unauthenticated remote code execution

Analyzed
Published 18-09-2026Last modified 21-09-2026

Vulnerability summary

CVE-2026-10027 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in ibm mq. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.45%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 21-09-2026
    Last modifiedVulnerability information updated.

Description

IBM MQ could allow a remote attacker to cause a denial of service or execute arbitrary code due to a buffer overflow when processing malformed compressed data on channels configured with compression enabled.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

Increase +0.08 pp

From 0.37% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm1 product
  • mq≥ 9.1.0.0, ≤ 9.1.0.37 LTS | ≥ 9.2.0.0, ≤ 9.2.0.43 LTS | ≥ 9.3.0.0, ≤ 9.3.0.41 LTS | ≥ 9.3.0.0, ≤ 9.3.5.1 CD | ≥ 9.4.0.0, ≤ 9.4.0.25 LTS | ≥ 9.4.0.0, ≤ 9.4.5.1 CD | ≥ 9.1.0.0, ≤ 9.1.0.37 | ≥ 9.2.0.0, ≤ 9.2.0.43 | ≥ 9.3.0.0, ≤ 9.3.0.41 | ≥ 9.3.0.0, ≤ 9.3.5.1 | ≥ 9.4.0.0, ≤ 9.4.0.25 | ≥ 9.4.0.0, ≤ 9.4.5.1 | 10.0.0.0

1 vendor · 1 product

References

1 links