CVE-2019-4141 [Medium] | Information Disclosure in Websphere Mq

IBM MQ 7.1.0.0 - 7.1.0.9, 7.5.0.0 - 7.5.0.9, 8.0.0.0 - 8.0.0.11, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.1 - 9.1.2 is vulnerable to a denial of service attack caused by a memory leak in the clustering code. IBM X-Force ID: 158337.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.38%	1.33%	+0.96%
2	2025-12-10	0.46%	0.38%	-0.09%
3	2025-11-21	—	0.46%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.38%

1.33%

+0.96%

2025-12-10

0.46%

0.38%

-0.09%

2025-11-21

—

0.46%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	3.6	[email protected]
5.3	3.0	MEDIUM	`CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.6	3.6	[email protected]
4.0	2.0	MEDIUM	`AV:N/AC:L/Au:S/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	8.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

3.6

[email protected]

5.3

3.0

MEDIUM

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.6

3.6

[email protected]

4.0

2.0

MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

8.0

2.9

[email protected]

Affected software / configurations for CVE-2019-4141

Vendor	Product	Version	Raw CPE
ibm	websphere_mq	>= 7.1.0.0, <= 7.1.0.9	cpe:2.3:a:ibm:websphere_mq:::::-:::*
ibm	websphere_mq	>= 7.5.0.0, <= 7.5.0.9	cpe:2.3:a:ibm:websphere_mq:::::-:::*
ibm	websphere_mq	>= 8.0.0.0, <= 8.0.0.11	cpe:2.3:a:ibm:websphere_mq:::::-:::*
ibm	websphere_mq	>= 9.0.0.0, <= 9.0.0.6	cpe:2.3:a:ibm:websphere_mq:::::lts:::*
ibm	websphere_mq	>= 9.1.0.0, <= 9.1.0.2	cpe:2.3:a:ibm:websphere_mq:::::-:::*
ibm	websphere_mq	>= 9.1.1, <= 9.1.2	cpe:2.3:a:ibm:websphere_mq:::::-:::*
ibm	websphere_mq_appliance	>= 8.0.0.0, <= 8.0.0.11	cpe:2.3:a:ibm:websphere_mq_appliance:::::-:::*
ibm	websphere_mq_appliance	>= 9.1.0.0, <= 9.1.0.2	cpe:2.3:a:ibm:websphere_mq_appliance:::::lts:::*
ibm	websphere_mq_appliance	>= 9.1.1, <= 9.1.2	cpe:2.3:a:ibm:websphere_mq_appliance:::::cd:::*

References for CVE-2019-4141

URL	Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/158337	VDB Entry Vendor Advisory
https://www.ibm.com/support/pages/node/876772	Patch Vendor Advisory

URL

CVE-2019-4141

Exploit prediction scoring system (EPSS) score for CVE-2019-4141

Common vulnerability scoring system (CVSS) metrics for CVE-2019-4141

Weakness enumeration for CVE-2019-4141

Affected software / configurations for CVE-2019-4141

References for CVE-2019-4141