CVE-2026-90848Network attack vectorHinoki check available

Browser script execution via unsanitized ResultMessage

Published Sep 15, 2026 · Updated Sep 15, 2026

Cross-site scripting in Governikus AusweisApp 2.5.0 through 2.5.4 allows remote attackers to execute script via a crafted ResultMessage. The StartPAOSResponse handler places the server-supplied ResultMessage into an application-generated browser error page without neutralizing executable markup. A malicious or compromised remote eID service must supply the response during an identification flow; execution is confined to the generated page's browser context.

CVSS severityUnavailable
Unscored
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-site scripting in Governikus AusweisApp 2.5.0 through 2.5.4 allows remote attackers to execute script via a crafted ResultMessage. The StartPAOSResponse handler places the server-supplied ResultMessage into an application-generated browser error page without neutralizing executable markup. A malicious or compromised remote eID service must supply the response during an identification flow; execution is confined to the generated page's browser context.

The record

CVE
CVE-2026-90848
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Governikus GmbH & Co. KG
Product
AusweisApp
Classifications
T1203
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.5.0
  2. Affected versionversion=2.5.1
  3. Affected versionversion=2.5.2
  4. Affected versionversion=2.5.3
  5. Affected versionversion=2.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Governikus GmbH & Co. KG · AusweisAppversion=2.5.0; version=2.5.1; version=2.5.2; version=2.5.3; version=2.5.4

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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