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Δ / VULNERABILITY RECORD

CVE-2026-3634.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSLOW / 3.9No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Sep 24, 2026

Disclosure summary

Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header

Source-reported weakness categories

CWE-93

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Mar

Open original source · Updated Sep 24, 2026

Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 3.9

VendorProduct / associationVersion / bounds
Microsoft update guidecbl2 libsoup 3.0.4-12 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 libsoup 3.4.4-14 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 libsoup 3.0.4-13 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 libsoup 3.4.4-17 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 libsoup 3.4.4-12 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 libsoup 3.4.4-15 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 libsoup 3.4.4-16 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 libsoup 3.0.4-13 (MSRC status code 3)
Microsoft update guidecbl2 libsoup 3.0.4-13 on CBL-Mariner 2.0 (MSRC status code 3)

Vendor remediation references

  • Release Notes · product IDs 21895-17084, 21478-17084, 21115-21692
  • Vendor guidance · product IDs 21895-17084, 21478-17084, 21115-21692

Original records & references

PUBLISHED 2026-03-20T21:02:26-04:00
MODIFIED 2026-09-24T22:03:21-04:00
INGESTED 2026-10-08T12:45:09-04:00