VulnerabilityPublished 21 Oct 2026

CVE-2026-107588: vaadin · Cross-site Scripting

Affects vaadinSource CVE Database V5

Not known to be exploited · CVSS 8.4 High · fixed in 25.3.1 : patch vaadin soon.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 4.0 base score

8.4High

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

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 25.3.1, 25.2.10, 24.10.11 +11

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

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

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: Active: Successful exploitation of this vulnerability requires a targeted user to perform specific, conscious interactions with the vulnerable system and the attacker’s payload, or the user’s interactions would actively subvert protection mechanisms which would lead to exploitation of the vulnerability.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Subsequent System.
Subsequent 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 Subsequent 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.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 21 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), 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.

cwe-1321

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
vaadincom.vaadin:vaadin	Affected >=22.0.0 <23.6.16 >=24.0.0 <24.4.24 >=24.5.0 <24.7.16 >=24.8.0 <24.9.23 >=24.10.0 <24.10.11 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.13 >=25.2.0 <25.2.10 >=25.3.0 <25.3.1	Fixed in 25.3.1 25.2.10 24.10.11 24.9.23 24.7.16 24.4.24 23.6.16
vaadin-charts-flowcom.vaadin:vaadin-charts-flow	Affected >=22.0.0 <23.6.16 >=24.0.0 <24.4.24 >=24.5.0 <24.7.15 >=24.8.0 <24.9.23 >=24.10.0 <24.10.11 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.13 >=25.2.0 <25.2.10 >=25.3.0 <25.3.1	Fixed in 25.3.1 25.2.10 24.10.11 24.9.23 24.7.15 24.4.24 23.6.16
vaadin-charts-flow-svg-generatorcom.vaadin:vaadin-charts-flow-svg-generator	Affected >=21.0.0 <23.6.16 >=24.0.0 <24.4.24 >=24.5.0 <24.7.15 >=24.8.0 <24.9.23 >=24.10.0 <24.10.11 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.13 >=25.2.0 <25.2.10 >=25.3.0 <25.3.1	Fixed in 25.3.1 25.2.10 24.10.11 24.9.23 24.7.15 24.4.24 23.6.16
vaadin@vaadin/charts	Affected >=22.0.0 <23.6.7 >=24.0.0 <24.4.19 >=24.5.0 <24.7.13 >=24.8.0 <24.9.19 >=24.10.0 <24.10.7 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.14 >=25.2.0 <25.2.14 >=25.3.0 <25.3.1	Fixed in 25.3.1 25.2.14 24.10.7 24.9.19 24.7.13 24.4.19 23.6.7
Mavenvaadin/com.vaadin:vaadin`pkg:maven/vaadin/com.vaadin:vaadin`Other threats	Affected >=22.0.0 <23.6.16 >=24.0.0 <24.4.24 >=24.5.0 <24.7.16 >=24.8.0 <24.9.23 >=24.10.0 <24.10.11 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.13 >=25.2.0 <25.2.10 >=25.3.0 <25.3.1	Fixed in 23.6.16 24.4.24 24.7.16 24.9.23 24.10.11 25.2.10 25.3.1
Mavenvaadin/com.vaadin:vaadin-charts-flow`pkg:maven/vaadin/com.vaadin:vaadin-charts-flow`Other threats	Affected >=22.0.0 <23.6.16 >=24.0.0 <24.4.24 >=24.5.0 <24.7.15 >=24.8.0 <24.9.23 >=24.10.0 <24.10.11 >=25.0.0 <=25.0.13 >=25.1.0 <=25.1.13 >=25.2.0 <25.2.10 >=25.3.0 <25.3.1	Fixed in 23.6.16 24.4.24 24.7.15 24.9.23 24.10.11 25.2.10 25.3.1

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

Description

Vaadin Charts renders charts with the Highcharts library and pins an exact version of it, 9.2.2 in Vaadin 22 to 24 and 12.2.0 in Vaadin 25, so an application cannot remove these vulnerabilities by upgrading Highcharts on its own. Highsoft disclosed several vulnerabilities in that library that are reachable through the chart configuration: writes to Object.prototype through dotted series.keys paths, and cross-site scripting through credits.href, through breadcrumbs.style, through HTML text parsing while printing, and through xlink:href attributes in exported charts. An application is affected where data an attacker controls reaches the chart configuration, for example through additionalOptions, through updateConfiguration(), or through text options that accept markup. The fixed Vaadin versions apply Highsoft's recommended workarounds to the bundled Highcharts when it loads, and keep the same Highcharts version. Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include: Product version Vaadin 22.0.0 - 23.6.15 Vaadin 24.0.0 - 24.4.23 Vaadin 24.5.0 - 24.7.15 Vaadin 24.8.0 - 24.9.22 Vaadin 24.10.0 - 24.10.10 Vaadin 25.0.0 - 25.2.9 Vaadin 25.3.0 Mitigation Upgrade to 23.6.16 Upgrade to 24.4.24 Upgrade to 24.7.16 Upgrade to 24.9.23 Upgrade to 24.10.11 Upgrade to 25.2.10 Upgrade to 25.3.1 or newer Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 23, 24, 25 version. Artifacts Maven coordinates / Vulnerable versions / Fixed version com.vaadin:vaadin / 22.0.0 - 23.6.15 / >=23.6.16 com.vaadin:vaadin / 24.0.0 - 24.4.23 / >=24.4.24 com.vaadin:vaadin / 24.5.0 - 24.7.15 / >=24.7.16 com.vaadin:vaadin / 24.8.0 - 24.9.22 / >=24.9.23 com.vaadin:vaadin / 24.10.0 - 24.10.10 / >=24.10.11 com.vaadin:vaadin / 25.0.0 - 25.0.13 / >=25.2.10 com.vaadin:vaadin / 25.1.0 - 25.1.13 / >=25.2.10 com.vaadin:vaadin / 25.2.0 - 25.2.9 / >=25.2.10 com.vaadin:vaadin / 25.3.0 / >=25.3.1 com.vaadin:vaadin-charts-flow / 22.0.0 - 23.6.15 / >=23.6.16 com.vaadin:vaadin-charts-flow / 24.0.0 - 24.4.22 / >=24.4.24 com.vaadin:vaadin-charts-flow / 24.5.0 - 24.7.14 / >=24.7.15 com.vaadin:vaadin-charts-flow / 24.8.0 - 24.9.22 / >=24.9.23 com.vaadin:vaadin-charts-flow / 24.10.0 - 24.10.10 / >=24.10.11 com.vaadin:vaadin-charts-flow / 25.0.0 - 25.0.13 / >=25.2.10 com.vaadin:vaadin-charts-flow / 25.1.0 - 25.1.13 / >=25.2.10 com.vaadin:vaadin-charts-flow / 25.2.0 - 25.2.9 / >=25.2.10 com.vaadin:vaadin-charts-flow / 25.3.0 / >=25.3.1 com.vaadin:vaadin-charts-flow-svg-generator / 21.0.0 - 23.6.15 / >=23.6.16 com.vaadin:vaadin-charts-flow-svg-generator / 24.0.0 - 24.4.22 / >=24.4.24 com.vaadin:vaadin-charts-flow-svg-generator / 24.5.0 - 24.7.14 / >=24.7.15 com.vaadin:vaadin-charts-flow-svg-generator / 24.8.0 - 24.9.22 / >=24.9.23 com.vaadin:vaadin-charts-flow-svg-generator / 24.10.0 - 24.10.10 / >=24.10.11 com.vaadin:vaadin-charts-flow-svg-generator / 25.0.0 - 25.0.13 / >=25.2.10 com.vaadin:vaadin-charts-flow-svg-generator / 25.1.0 - 25.1.13 / >=25.2.10 com.vaadin:vaadin-charts-flow-svg-generator / 25.2.0 - 25.2.9 / >=25.2.10 com.vaadin:vaadin-charts-flow-svg-generator / 25.3.0 / >=25.3.1 npm packages npm package / Vulnerable versions / Fixed version @vaadin/charts / 22.0.0 - 23.6.6 / >=23.6.7 @vaadin/charts / 24.0.0 - 24.4.18 / >=24.4.19 @vaadin/charts / 24.5.0 - 24.7.12 / >=24.7.13 @vaadin/charts / 24.8.0 - 24.9.18 / >=24.9.19 @vaadin/charts / 24.10.0 - 24.10.6 / >=24.10.7 @vaadin/charts / 25.0.0 - 25.0.13 / >=25.2.14 @vaadin/charts / 25.1.0 - 25.1.14 / >=25.2.14 @vaadin/charts / 25.2.0 - 25.2.13 / >=25.2.14 @vaadin/charts / 25.3.0 / >=25.3.1

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-79

Technical details

References

Community reviews

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