HOMEVULNERABILITIESCVE-2026-3634
MEDIUM

CVE-2026-3634

CWE-93Published: March 17, 2026· Updated: Mar 19, 2026

6.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:8.3th

Official Description

A flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()` function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks.

NVD Source

Technical Analysis

CVE-2026-3634 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

gnome1 product
libsoup
Red Hat1 product
enterprise linux
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-3634
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=2445129
ADVISORYhttps://gitlab.gnome.org/GNOME/libsoup/-/issues/485
ADVISORYhttps://gitlab.gnome.org/GNOME/libsoup/-/issues/485

All References (4)

→
https://access.redhat.com/security/cve/CVE-2026-3634Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2445129Issue Tracking · Vendor Advisory
→
https://gitlab.gnome.org/GNOME/libsoup/-/issues/485Exploit · Issue Tracking · Vendor Advisory
→
https://gitlab.gnome.org/GNOME/libsoup/-/issues/485Exploit · Issue Tracking · Vendor Advisory

Quick Facts

CVE IDCVE-2026-3634
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-93
CISA KEVNo
EPSS (30d)0.03%
Affected2 vendors
PublishedMar 17, 2026

Related CVEs (CWE-93)

CVE-2026-33128
10.0
CVE-2026-45372
9.9
CVE-2026-50292
9.8
CVE-2026-11362
9.8
CVE-2026-9270
9.1
CVE-2026-11373
9.1

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-3634 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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