Log in Start free

Vulnerability · Published Jul 6, 2026 · Assigned by EEF

CVE-2026-54893Email-derived URL path injection in the Swoosh Microsoft Graph adapter

Low 2.1

In plain English

A low-severity security flaw in swoosh from swoosh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 4.0)2.1Low
Exploit odds (30 days)0.2%top 89.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

URL path injection in the Microsoft Graph adapter of Swoosh. Swoosh.Adapters.MsGraph builds its Microsoft Graph API request URL by interpolating the sender's email address into the URL path (/users/{from}/sendMail) without percent-encoding or validation. In applications that derive the from address from untrusted or user-influenced input (for example a relay, a contact form, or a "send as" feature), an attacker can place URL-special characters such as /, ?, or # in the local part of the address to escape the intended path segment and rewrite the path and query string of the request. Because the same authenticated POST is sent with the application's Microsoft Graph bearer token, the attacker can redirect it to other Graph endpoints within the token's scopes and control the request's query string. Applications that always use a fixed, trusted from address are not affected. This issue affects swoosh: from 1.12.0 before 1.26.3.

Affected products (as reported)

VendorProductVersions
swoosh swoosh 1.12.0 – before 1.26.3
swoosh swoosh 23bfcdab71aee4613858ba6d116bb3311b72aa58 – before e38235453e81d1727bfc8d91e69ec4cb211ccf61

Weakness: CWE-116 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

References