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Qlik Sense CVE-2023-41265

CRITICAL
HTTP Request/Response Smuggling (CWE-444)
2023-08-29 cve@mitre.org
Information Disclosure Microsoft Request Smuggling Qlik Sense Qlik
9.9
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-444
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V4 - API and Web Service HTTP request consistency
Impact

CVSS score of 9.9 (CRITICAL). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived

A remote attacker could manipulate HTTP request interpretation between frontend and backend servers by sending crafted requests to the affected application.
Emergency Immediate action required. Why: CRITICAL + in CISA KEV (actively exploited), no patch available.
Exploited in the wild (CISA KEV) No patch listed yet 85.0% exploitation probability (EPSS)

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AnalysisAI

An HTTP Request Tunneling vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier,. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Enforce strict HTTP parsing, normalize requests at proxy layer, use HTTP/2 end-to-end, reject ambiguous headers.

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Technical ContextAI · show details

This vulnerability is classified as HTTP Request/Response Smuggling (CWE-444), which allows attackers to manipulate HTTP request interpretation between frontend and backend servers. An HTTP Request Tunneling vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier allows a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13. Affected products include: Qlik Qlik Sense.

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Severity by source

NVD PRIMARY 9.9 CRITICAL
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Added to CISA KEV
Jul 14, 2026 - 04:22 CISA
CVE Published
Aug 29, 2023 - 23:15 nvd
CRITICAL 9.9

DescriptionNVD

An HTTP Request Tunneling vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier allows a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.

Threat Intelligence Overview

Threat Score
7.5/10
Composite threat intelligence
EPSS Score
85.0%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium
NVD CVE.org CISA KEV EPSS POC (1)

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV Yes
Public POC Yes
EPSS 85.0%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + in CISA KEV (actively exploited), no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
Active
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
High

Priority Score

205
Low Medium High Critical
KEV: +50
EPSS: +85
CVSS: +50
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

HTTP Request Smuggling HIGH

HTTP request smuggling exploits inconsistencies in how front-end and back-end servers parse HTTP message boundaries.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:qlik:qlik_sense:august_2022:-:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_1:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_10:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_11:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_12:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_2:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_3:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_4:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_5:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_6:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_7:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_8:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:august_2022:patch_9:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:-:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_1:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_2:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_3:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_4:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_5:*:*:enterprise:windows:*:*
cpe:2.3:a:qlik:qlik_sense:february_2023:patch_6:*:*:enterprise:windows:*:*
+ 16 more

More in Qlik Sense

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CVE-2023-41266 MEDIUM POC
6.5 Aug 29

A path traversal vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, Feb
CVE-2023-48365 CRITICAL
9.9 Nov 15

Qlik Sense Enterprise for Windows before August 2023 Patch 2 allows unauthenticated remote code execution, aka QB-21683.
CVE-2019-11628 MEDIUM
6.5 May 01

An issue was discovered in QlikView Server before 11.20 SR19, 12.00 and 12.10 before 12.10 SR11, 12.20 before SR9, and 1
CVE-2022-0564 MEDIUM
5.3 Feb 21

A vulnerability in Qlik Sense Enterprise on Windows could allow an remote attacker to enumerate domain user accounts. Ra
CVE-2025-61138 HIGH
7.5 Nov 20

Qlik Sense Enterprise v14.212.13 was discovered to contain an information leak via the /dev-hub/ directory. Rated high s

Same weakness CWE-444 – HTTP Request/Response Smuggling

View all
CVE-2026-48710 MEDIUM POC
6.5
CVE-2021-33037 MEDIUM
5.3
CVE-2026-88773 CRITICAL POC
9.3
CVE-2021-23336 MEDIUM POC
5.9
CVE-2018-3907 CRITICAL POC
10.0
CVE-2024-10264 CRITICAL POC
9.8
CVE-2022-2466 CRITICAL POC
9.8
CVE-2020-7611 CRITICAL POC
9.8

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
ADVISORY https://community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-Enterprise-for-Windows/ta-p/2110801 REF https://community.qlik.com/t5/Release-Notes/tkb-p/ReleaseNotes REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-41265

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