VulnerabilityPublished 10 Jan 2026Updated 23 Feb 2026

CVE-2026-0824: questdb ui · Cross-site Scripting

Affects questdb uiSource CVE Database V5

Public exploit available · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score

5.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
questdbui	Affected 1.11.0 – 1.11.9 10 affected builds	Fixed in–
GitHubquestdb/ui`pkg:github/questdb/ui`Other threats	Affected 1.11.0 – 1.11.9 10 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2026-0824, organizations should immediately upgrade the QuestDB UI component to version 1.1.10 or later, or apply the patch included in QuestDB 9.3.0 when available. Beyond upgrading, administrators should restrict access to the Web Console to trusted networks and users only, ideally behind VPNs or secure gateways. Implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers accessing the Web Console. Regularly audit and sanitize all user inputs and outputs in custom extensions or integrations with QuestDB to prevent similar vulnerabilities. Educate users about the risks of interacting with untrusted links or content that could trigger XSS attacks. Monitor logs and network traffic for suspicious activity indicative of exploitation attempts. Employ web application firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting QuestDB interfaces. Finally, maintain an up-to-date inventory of affected software versions to ensure timely patch management.

Description

A security flaw has been discovered in questdb ui up to 1.11.9. Impacted is an unknown function of the component Web Console. The manipulation results in cross site scripting. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.1.10 is recommended to address this issue. The patch is identified as b42fd9f18476d844ae181a10a249e003dafb823d. You should upgrade the affected component. The vendor confirmed early that the fix "is going to be released as a part of QuestDB 9.3.0" as well.

Impact

The primary impact of CVE-2026-0824 is on the confidentiality and integrity of data accessible through the QuestDB Web Console. Attackers exploiting this XSS vulnerability can execute arbitrary JavaScript in the context of the victim's browser, potentially stealing session tokens, credentials, or performing unauthorized actions on behalf of the user. This can lead to unauthorized data access or manipulation within the database management interface. Although availability is not directly affected, successful exploitation could facilitate further attacks or lateral movement within an organization's infrastructure. Organizations relying on QuestDB for critical data storage and analytics may face data breaches or operational disruptions if attackers leverage this vulnerability. The fact that exploitation requires user interaction limits the attack scope but does not eliminate risk, especially in environments where users have high privileges or access to sensitive data. The public availability of exploit code increases the likelihood of opportunistic attacks, particularly targeting organizations slow to patch.

Summary

CVE-2026-0824 is a cross-site scripting vulnerability found in the QuestDB UI Web Console component, affecting versions 1.11.0 through 1.11.9. This vulnerability arises from insufficient input sanitization or output encoding in an unspecified function within the Web Console, allowing remote attackers to inject malicious scripts. The attack vector is network-based with no authentication required, but user interaction is necessary to trigger the malicious payload. The vulnerability has a CVSS 4.0 base score of 5.1, indicating medium severity, reflecting its moderate impact on confidentiality and integrity with no impact on availability. The vendor has released a patch in version 1.1.10 and confirmed inclusion in the upcoming QuestDB 9.3.0 release. Although no known exploits are currently observed in the wild, public exploit code is available, increasing the risk of exploitation. The Web Console is a critical interface for database management, and exploitation could lead to theft of session cookies, unauthorized actions, or defacement of the UI. The vulnerability does not require privileges or elevated access, making it accessible to remote unauthenticated attackers who can lure users into interacting with crafted content.

References

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