AZL-105543

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Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105543.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-105543
Upstream
  • CVE-2026-103399
Published
2026-09-30T18:18:16Z
Modified
2026-10-05T05:34:30Z
Summary
CVE-2026-103399 affecting package libsoup 3.4.4-16
Details

A flaw was found in SoupServer (libsoup). When an HTTP/1.x client sends a request with Expect: 100-continue and a request body, and SoupServer returns an early final (non-1xx) response before the body is read, the server neither drains the declared body bytes nor closes the connection. On a keep-alive connection, those leftover bytes are interpreted as a subsequent HTTP request. A remote, unauthenticated attacker can place a complete HTTP request in the body and cause SoupServer to process that smuggled request, leading to unintended request handling.

References

Affected packages

Azure Linux:3 / libsoup

Package

Name
libsoup
Purl
pkg:rpm/azure-linux/libsoup

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Last Affected
3.4.4-16

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105543.json"