CISA KEV Critical Injection

CVE-2023-41265 — Qlik Sense HTTP Tunneling Vulnerability

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.

Published Aug 29, 2023 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: mitre

Urgent

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Dec 7, 2023 R used by ransomware (CISA) Detection templates (Nuclei) · 1 Proofs of concept on GitHub · 1

How the score was calculated

Confirmed exploitation (CISA KEV)+35
Used in ransomware campaigns (CISA)+10
Public exploit/PoC (nuclei, github)+10
EPSS 88.2% (30-day exploitation probability)+15
Technical severity (critical)+10
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Confirmed

CISA KEV, listed Dec 7, 2023

EPSS FIRST

88.22%

ahead of 100% of scored CVEs · Oct 14, 2026

Affects

Qlik

Qlik Sense

CVSS base

9.9

Critical · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Active

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

CISA required action CISA

Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

US federal deadline: Dec 28, 2023 — passed 1022 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Qlik Qlik Sense).
Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Qlik	Qlik Sense	version november_2022-patch_10version february_2023-patch_6version february_2023-patch_7version may_2023version may_2023-patch_1version may_2023-patch_2version may_2023-patch3version november_2022 and 28 more version november_2022-patch_1version february_2023-patch_5version november_2022-patch_2version november_2022-patch_3version november_2022-patch_4version november_2022-patch_5version november_2022-patch_6version november_2022-patch_7version november_2022-patch_8version november_2022-patch_9version august_2022-patch_6version august_2022-patch_1version august_2022-patch_10version august_2022-patch_11version august_2022-patch_12version august_2022-patch_2version august_2022-patch_3version august_2022-patch_4version august_2022-patch_5version august_2022version august_2022-patch_7version august_2022-patch_8version august_2022-patch_9version february_2023version february_2023-patch_1version february_2023-patch_2version february_2023-patch_3version february_2023-patch_4	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
9.9	CVSS 3.1	Critical	3.1	6.0	nvd@nist.gov via NIST National Vulnerability Database
9.6	CVSS 3.1	Critical	3.1	5.8	cve@mitre.org via NIST National Vulnerability Database
9.6	CVSS 3.1	Critical	—	—	GitHub, Inc. via GitHub Security Advisories
9.6	CVSS 3.1	Critical	—	—	mitre via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 9.9 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-444 · HTTP Request Smuggling

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed

Dec 7, 2023

Federal deadline

Dec 28, 2023

passed 1022 day(s) ago

Ransomware use

Known

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Detection templates (Nuclei)

Qlik Sense Enterprise - HTTP Request Smuggling

Proofs of concept on GitHub

A Nuclei template to detect ZeroQlik (CVE-2023-41265 and CVE-2023-41266) ★ 5 Aug 30, 2023

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 12, 2026 → Oct 14, 2026 · 3 reading(s) · max 88.22%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Look for parameters with command/query metacharacters and unexpected child processes of the service.
Hunt retroactively in logs from before Dec 7, 2023 (KEV listing): exploitation may have started earlier.

web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Affected products added · qlik/qlik sense
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 9.9
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Added to CISA KEV (detected)
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
Record created in this database
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
2023
Added to CISA KEV catalog
Dec 6, 2023 · CISA
CVE published
Aug 29, 2023 · mitre

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 13, 2026 – Oct 13, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

5 on the record

community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-E
Vendor Advisory, NIST National Vulnerability Database
www.cisa.gov/known-exploited-vulnerabilities-catalog
US Government Resource, NIST National Vulnerability Database
community.qlik.com/t5/Release-Notes/tkb-p/ReleaseNotes
Release Notes, NIST National Vulnerability Database
github.com/advisories/GHSA-h5r5-8fxj-m5cm
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2023-41265
GitHub Security Advisories

Elsewhere on this site

Qlik
every CVE for this vendor

2023-12
what else CISA listed that month

Injection
same class

CWE-444
other pages naming this weakness

Related CVEs (same products)

High CVE-2025-61138 Qlik Sense Enterprise v14.212.13 was discovered to contain an information leak via the… Nov 20, 2025
Critical CVE-2023-48365 Qlik Sense HTTP Tunneling Vulnerability KEV Nov 15, 2023
Medium CVE-2023-41266 Qlik Sense Path Traversal Vulnerability KEV Aug 29, 2023

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-41265 is "Qlik Sense HTTP Tunneling Vulnerability", rated Critical. It affects Qlik Sense (Qlik); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 9.9 describes technical severity. EPSS 88.22% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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