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Back to active CVEs
Low ยท CVSS 2.3CVE-2026-110737

Push Endpoint Returns Permissive CORS HeadersCVE-2026-110737

Answer in brief

CVE-2026-110737 records a Low severity (CVSS 2.3) vulnerability in Push Endpoint Returns Permissive CORS Headers. The current sources do not mark it as known exploited. The current feed maps vaadin/com.vaadin:flow-server (generic), vaadin/com.vaadin:vaadin (generic), vaadin/com.vaadin:vaadin-core (generic), vaadin/com.vaadin:vaadin-server (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
Low ยท CVSS 2.3
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 2.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps vaadin/com.vaadin:flow-server (generic), vaadin/com.vaadin:vaadin (generic), vaadin/com.vaadin:vaadin-core (generic), vaadin/com.vaadin:vaadin-server (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
vaadin/com.vaadin:flow-servergeneric>=2.13.0 <2.13.8 || >=23.6.0 <23.6.16 || >=24.4.0 <24.4.19 || >=24.5.0 <=24.5.17 || >=24.6.0 <=24.6.14 || >=24.7.0 <24.7.16 || >=24.8.0 <=24.8.16 || >=24.9.0 <24.9.29 || >=24.10.0 <24.10.15 || >=25.0.0 <=25.0.15 || >=25.1.0 <25.1.19 || >=25.2.0 <25.2.13 || >=25.3.0 <25.3.42.13.8, 23.6.16, 24.4.19, 24.7.16, 24.9.29, 24.10.15, 25.1.19, 25.2.13, 25.3.4
vaadin/com.vaadin:vaadingeneric>=14.14.0 <14.14.8 || >=23.6.0 <23.6.17 || >=24.4.0 <24.4.26 || >=24.5.0 <=24.5.15 || >=24.6.0 <=24.6.13 || >=24.7.0 <24.7.17 || >=24.8.0 <=24.8.17 || >=24.9.0 <24.9.24 || >=24.10.0 <24.10.12 || >=25.0.0 <=25.0.13 || >=25.1.0 <=25.1.13 || >=25.2.0 <25.2.11 || >=25.3.0 <25.3.314.14.8, 23.6.17, 24.4.26, 24.7.17, 24.9.24, 24.10.12, 25.2.11, 25.3.3
vaadin/com.vaadin:vaadin-coregeneric>=14.14.0 <14.14.8 || >=23.6.0 <23.6.17 || >=24.4.0 <24.4.26 || >=24.5.0 <=24.5.15 || >=24.6.0 <=24.6.13 || >=24.7.0 <24.7.17 || >=24.8.0 <=24.8.17 || >=24.9.0 <24.9.24 || >=24.10.0 <24.10.12 || >=25.0.0 <=25.0.13 || >=25.1.0 <=25.1.13 || >=25.2.0 <25.2.11 || >=25.3.0 <25.3.314.14.8, 23.6.17, 24.4.26, 24.7.17, 24.9.24, 24.10.12, 25.2.11, 25.3.3
vaadin/com.vaadin:vaadin-servergeneric>=7.1.0 <7.7.55 || >=8.0.0 <8.32.27.7.55, 8.32.2
vaadin/com.vaadin:vaadin-server-mpr-jakartageneric>=7.7.36 <7.7.55 || >=8.18.0 <8.32.27.7.55, 8.32.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for vaadin/com.vaadin:flow-server, vaadin/com.vaadin:vaadin, vaadin/com.vaadin:vaadin-core.
  2. 2Review the reported fix. Source-reported solution: Users of affected versions should apply the following mitigation or upgrade.

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevaadin.com
Upstream source description

The push endpoint of a Vaadin application that uses server push reflects the request Origin into the Access-Control-Allow-Origin response header and allows credentials, because Flow configures Atmosphere with DROP_ACCESS_CONTROL_ALLOW_ORIGIN_HEADER set to false and its CorsInterceptor then echoes whatever Origin the request carries. A page on any origin can therefore make a cross origin request to that endpoint with the user's cookies and read the response, although reading anything useful also requires the push identifier of that session. Applications that do not use @Push are not affected, and neither is the WebSocket transport. The behaviour was introduced in January 2015 and is present in every Flow release and in Vaadin Framework from 7.1.0, which is when push was added. Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include: Product version Vaadin 14.14.0 - 14.14.7 Vaadin 23.6.0 - 23.6.16 Vaadin 24.4.0 - 24.4.25 Vaadin 24.5.0 - 24.5.15 Vaadin 24.6.0 - 24.6.13 Vaadin 24.7.0 - 24.7.16 Vaadin 24.8.0 - 24.8.17 Vaadin 24.9.0 - 24.9.23 Vaadin 24.10.0 - 24.10.11 Vaadin 25.0.0 - 25.0.13 Vaadin 25.1.0 - 25.1.13 Vaadin 25.2.0 - 25.2.10 Vaadin 25.3.0 - 25.3.2 Vaadin Framework 7.1.0 - 7.7.54 Vaadin Framework 8.0.0 - 8.32.1 Mitigation Upgrade to 14.14.8 Upgrade to 23.6.17 Upgrade to 24.4.26 Upgrade to 24.7.17 Upgrade to 24.7.17 Upgrade to 24.7.17 Upgrade to 24.9.24 Upgrade to 24.9.24 Upgrade to 24.10.12 Upgrade to 25.2.11 Upgrade to 25.2.11 Upgrade to 25.2.11 Upgrade to 25.3.3 Upgrade to 7.7.55 Upgrade to 8.32.2 Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version. Artifacts Maven coordinates / Vulnerable versions / Fixed version com.vaadin:vaadin / 14.14.0 - 14.14.7 / >=14.14.8 com.vaadin:vaadin / 23.6.0 - 23.6.16 / >=23.6.17 com.vaadin:vaadin / 24.4.0 - 24.4.25 / >=24.4.26 com.vaadin:vaadin / 24.5.0 - 24.5.15 / >=24.7.17 com.vaadin:vaadin / 24.6.0 - 24.6.13 / >=24.7.17 com.vaadin:vaadin / 24.7.0 - 24.7.16 / >=24.7.17 com.vaadin:vaadin / 24.8.0 - 24.8.17 / >=24.9.24 com.vaadin:vaadin / 24.9.0 - 24.9.23 / >=24.9.24 com.vaadin:vaadin / 24.10.0 - 24.10.11 / >=24.10.12 com.vaadin:vaadin / 25.0.0 - 25.0.13 / >=25.2.11 com.vaadin:vaadin / 25.1.0 - 25.1.13 / >=25.2.11 com.vaadin:vaadin / 25.2.0 - 25.2.10 / >=25.2.11 com.vaadin:vaadin / 25.3.0 - 25.3.2 / >=25.3.3 com.vaadin:vaadin-core / 14.14.0 - 14.14.7 / >=14.14.8 com.vaadin:vaadin-core / 23.6.0 - 23.6.16 / >=23.6.17 com.vaadin:vaadin-core / 24.4.0 - 24.4.25 / >=24.4.26 com.vaadin:vaadin-core / 24.5.0 - 24.5.15 / >=24.7.17 com.vaadin:vaadin-core / 24.6.0 - 24.6.13 / >=24.7.17 com.vaadin:vaadin-core / 24.7.0 - 24.7.16 / >=24.7.17 com.vaadin:vaadin-core / 24.8.0 - 24.8.17 / >=24.9.24 com.vaadin:vaadin-core / 24.9.0 - 24.9.23 / >=24.9.24 com.vaadin:vaadin-core / 24.10.0 - 24.10.11 / >=24.10.12 com.vaadin:vaadin-core / 25.0.0 - 25.0.13 / >=25.2.11 com.vaadin:vaadin-core / 25.1.0 - 25.1.13 / >=25.2.11 com.vaadin:vaadin-core / 25.2.0 - 25.2.10 / >=25.2.11 com.vaadin:vaadin-core / 25.3.0 - 25.3.2 / >=25.3.3 com.vaadin:flow-server / 2.13.0 - 2.13.7 / >=2.13.8 com.vaadin:flow-server / 23.6.0 - 23.6.15 / >=23.6.16 com.vaadin:flow-server / 24.4.0 - 24.4.18 / >=24.4.19 com.vaadin:flow-server / 24.5.0 - 24.5.17 / >=24.7.17 com.vaadin:flow-server / 24.6.0 - 24.6.14 / >=24.7.17 com.vaadin:flow-server / 24.7.0 - 24.7.15 / >=24.7.16 com.vaadin:flow-server / 24.8.0 - 24.8.16 / >=24.9.24 com.vaadin:flow-server / 24.9.0 - 24.9.28 / >=24.9.29 com.vaadin:flow-server / 24.10.0 - 24.10.14 / >=24.10.15 com.vaadin:flow-server / 25.0.0 - 25.0.15 / >=25.2.11 com.vaadin:flow-server / 25.1.0 - 25.1.18 / >=25.1.19 com.vaadin:flow-server / 25.2.0 - 25.2.12 / >=25.2.13 com.vaadin:flow-server / 25.3.0 - 25.3.3 / >=25.3.4 com.vaadin:vaadin-server / 7.1.0 - 7.7.54 / >=7.7.55 com.vaadin:vaadin-server / 8.0.0 - 8.32.1 / >=8.32.2 com.vaadin:vaadin-server-mpr-jakarta / 7.7.36 - 7.7.54 / >=7.7.55 com.vaadin:vaadin-server-mpr-jakarta / 8.18.0 - 8.32.1 / >=8.32.2

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-942, CWE-346
Source
CVE List V5
Source checked
Oct 27, 2026
References
3 linked sources
Open source record