Authentication bypass via authorization code injection in SAP Approuter

published 2025-02-11 20 mo ago modified 2026-06-17 4 mo ago also GHSA-cpfx-964w-4jvp , EUVD-2025-3971

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

The SAP Approuter Node.js package version v16.7.1 and before is vulnerable to Authentication bypass. When trading an authorization code an attacker can steal the session of the victim by injecting malicious payload causing High impact on confidentiality and integrity of the application

Patch / fix

fixed in 1

npm @sap/approuter 16.7.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-11)

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
GitHub	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@sap/approuter	>=2.6.1, <16.7.2	16.7.2

Affected products

SAP_SE SAP Approuter Node.js package

Classification

Weakness

CWE-1287 Improper Validation of Specified Type of Input
CWE-302 Authentication Bypass by Assumed-Immutable Data
CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary