Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames
Products / packages Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 7 · 2 more
Published
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:LSeverity
low3.9CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Not established by this record
Missing evidence does not mean no public exploit exists.
Remediation
Source guidance available
Review the recorded instructions. Guidance may be a workaround rather than a fixed version.
What this means
A flaw in libsoup allows HTTP smuggling and server-side request forgery via malformed hostnames, potentially leading to unauthorized requests. The impact is low. A remote attacker could exploit this by injecting special characters into HTTP headers.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
Check the exact model, release, and any platform requirements against your installation.
Red Hat · redhat
Red Hat Enterprise Linux 10
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 10
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:10Red Hat · redhat
Red Hat Enterprise Linux 6
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 6
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Other versions: unknown
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:6Red Hat · redhat
Red Hat Enterprise Linux 7
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 7
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Other versions: affected
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:7Red Hat · redhat
Red Hat Enterprise Linux 8
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8Red Hat · redhat
Red Hat Enterprise Linux 9
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 9
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
Read the full publisher description
A flaw was found in libsoup, a library used by applications to send network requests. This vulnerability occurs because libsoup does not properly validate hostnames, allowing special characters to be injected into HTTP headers. A remote attacker could exploit this to perform HTTP smuggling, where they can send hidden, malicious requests alongside legitimate ones. In certain situations, this could lead to Server-Side Request Forgery (SSRF), enabling an attacker to force the server to make unauthorized requests to other internal or external systems. The impact is low, as SoupServer is not actually used in internet infrastructure.
References
3 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-3632View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Contributing organizations · 2
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Timeline
All times UTCAdvisory published
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Source updated
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Last imported by cve.new
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.