CVE-2026-27680: Due to improper input handling under certain conditions, SAP NetWeaver Application Server ABAP allows an attac

Routine

LOW 3.1DOWNGRADE

CVE-2026-27680 is a low-severity flaw (CVSS 3.1) affecting netweaver application server abap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Due to improper input handling under certain conditions, SAP NetWeaver Application Server ABAP allows an attacker to inject custom Cascading Style Sheets (CSS) data into a web page served by the application. When a user accesses or clicks the affected page, the injected CSS is executed. As a result, the issue has a low impact on confidentiality, while integrity and availability are not impacted.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-276
Published	2026-05-14
Last modified	2026-10-26

Publisher (CNA): SAP SE · Vendor: sap

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-14 19:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

sap netweaver application server abap DOWNGRADE

Affected: 758 · 816

Fixed in: no fixed release known

Safe to downgrade to: a release before 758

1. Check installed version

apt-cache policy netweaver-application-server-abap || rpm -q netweaver-application-server-abap || netweaver-application-server-abap --version

2. No fixed release: DOWNGRADE to a release before 758 (Debian / Ubuntu)

apt-cache madison netweaver-application-server-abap sudo apt install netweaver-application-server-abap=<VERSION_BEFORE_758> sudo apt-mark hold netweaver-application-server-abap

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list netweaver-application-server-abap sudo dnf downgrade netweaver-application-server-abap-<VERSION_BEFORE_758> sudo dnf versionlock add netweaver-application-server-abap

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27680?

netweaver application server abap: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-27680 being exploited?

CVE-2026-27680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27680 affect?

CVE-2026-27680 affects netweaver application server abap. Severity is low (CVSS 3.1). Due to improper input handling under certain conditions, SAP NetWeaver Application Server ABAP allows an attacker to inject custom Cascading Style Sheets (CSS) data into a web page served by the application. When a user accesses or clicks t

How urgent is CVE-2026-27680?

Priority 13/100. No elevated risk signals yet.

Software pages

SAP vulnerabilities

Related CVEs

CVE-2026-40135 MEDIUM 6.5 DOWNGRADE An OS Command Injection vulnerability exists in the SAP NetWeaver Application Server for ABAP and ABAP Platfor
CVE-2026-27682 MEDIUM 4.7 DOWNGRADE Due to a reflected cross-site scripting (XSS) vulnerability in SAP NetWeaver Application Server ABAP (Applicat

References

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