Medium
libsoup2.4, libsoup3 — security advisory
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.
- Products
- libsoup2.4, libsoup3
- Affected versions
- 2.50.0-2debian1, 2.52.1-1, 2.52.2-1, 2.52.2-1ubuntu0.1, 2.52.2-1ubuntu0.2, 2.52.2-1ubuntu0.3, 2.52.2-1ubuntu0.3+esm1, 2.52.2-1ubuntu0.3+esm2, 2.52.2-1ubuntu0.3+esm3, 2.52.2-1ubuntu0.3+esm4, 2.52.2-1ubuntu0.3+esm5, 2.52.2-1ubuntu0.3+esm6, 2.52.2-1ubuntu0.3+esm7, 2.52.2-1ubuntu0.3+esm8, 2.60.1-1, 2.60.2-1, 2.60.2-2, 2.60.3-1, 2.61.90-1, 2.62.0-1, 2.62.1-1, 2.62.1-1ubuntu0.1, 2.62.1-1ubuntu0.3, 2.62.1-1ubuntu0.4, 2.62.1-1ubuntu0.4+esm1, 2.62.1-1ubuntu0.4+esm2, 2.62.1-1ubuntu0.4+esm3, 2.62.1-1ubuntu0.4+esm4, 2.62.1-1ubuntu0.4+esm5, 2.62.1-1ubuntu0.4+esm6, 2.62.1-1ubuntu0.4+esm7, 2.62.1-1ubuntu0.4+esm8, 2.62.1-1ubuntu0.4+esm9, 2.68.2-0ubuntu1, 2.68.2-1, 2.68.2-2, 2.68.2-2build2, 2.69.90-1, 2.70.0-1, 2.70.0-1ubuntu0.1, 2.70.0-1ubuntu0.2, 2.70.0-1ubuntu0.3, 2.70.0-1ubuntu0.4, 2.70.0-1ubuntu0.5, 2.70.0-1ubuntu0.5+esm1, 2.70.0-1ubuntu0.5+esm2, 2.70.0-1ubuntu0.5+esm3, 2.70.0-1ubuntu0.5+esm4, 2.72.0-3ubuntu3, 2.74.1-1, 2.74.2-2, 2.74.2-3, 2.74.2-3ubuntu0.1, 2.74.2-3ubuntu0.2, 2.74.2-3ubuntu0.3, 2.74.2-3ubuntu0.4, 2.74.2-3ubuntu0.5, 2.74.2-3ubuntu0.6, 2.74.2-3ubuntu0.7, 2.74.2-3ubuntu0.8, 2.74.2-3ubuntu0.9, 2.74.3-1, 2.74.3-10, 2.74.3-10.1, 2.74.3-10.1ubuntu1, 2.74.3-10.1ubuntu2, 2.74.3-10.1ubuntu3, 2.74.3-10.1ubuntu4, 2.74.3-10.1ubuntu4.1, 2.74.3-10.1ubuntu5, 2.74.3-10.1ubuntu5+esm1, 2.74.3-10.1ubuntu5+esm2, 2.74.3-10.1ubuntu5+esm3, 2.74.3-2, 2.74.3-3, 2.74.3-6, 2.74.3-6build1, 2.74.3-6ubuntu1, 2.74.3-6ubuntu1.1, 2.74.3-6ubuntu1.2, 2.74.3-6ubuntu1.3, 2.74.3-6ubuntu1.4, 2.74.3-6ubuntu1.5, 2.74.3-6ubuntu1.6, 2.74.3-6ubuntu1.7, 2.74.3-6ubuntu1.8, 2.74.3-6ubuntu1.9, 3.0.4-2, 3.0.4-3, 3.0.5-1, 3.0.7-0ubuntu1, 3.0.7-0ubuntu1+esm1, 3.0.7-0ubuntu1+esm2, 3.0.7-0ubuntu1+esm3, 3.0.7-0ubuntu1+esm4, 3.0.7-0ubuntu1+esm5, 3.0.7-0ubuntu1+esm6, 3.0.7-0ubuntu1+esm7, 3.0.7-0ubuntu1+esm8, 3.0.7-0ubuntu1+esm9, 3.4.2-4, 3.4.4-1, 3.4.4-2, 3.4.4-4, 3.4.4-5, 3.4.4-5build1, 3.4.4-5build2, 3.4.4-5ubuntu0.1, 3.4.4-5ubuntu0.2, 3.4.4-5ubuntu0.3, 3.4.4-5ubuntu0.4, 3.4.4-5ubuntu0.5, 3.4.4-5ubuntu0.6, 3.4.4-5ubuntu0.7, 3.4.4-5ubuntu0.8, 3.4.4-5ubuntu0.9, 3.6.5-1, 3.6.5-1ubuntu1, 3.6.5-3, 3.6.5-4, 3.6.5-4ubuntu0.1, 3.6.5-4ubuntu0.2, 3.6.5-5, 3.6.5-6, 3.6.5-7, 3.6.5-9, 3.6.6-1, 3.6.6-1ubuntu0.1, 3.6.6-1ubuntu3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-3632
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:40 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-3632
libsoup2.4
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup3
Fixed versions: Not specified
libsoup2.4
Fixed versions: Not specified
Complete source record
{
"id": "2da763b60d6353ba9f1d823a75bf7388d272f5ba9db49ef8ab6b0b1e15a4f261",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-3632",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-3632",
"summary": "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.",
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{
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},
{
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},
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{
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{
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{
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{
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"evidence": "/affected/11/versions"
},
{
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},
{
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"evidence": "/affected/11/versions"
},
{
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]
},
{
"name": {
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},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.74.3-10.1ubuntu4",
"evidence": "/affected/12/versions"
},
{
"value": "2.74.3-10.1ubuntu5",
"evidence": "/affected/12/versions"
},
{
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"evidence": "/affected/12/versions"
},
{
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"evidence": "/affected/12/versions"
},
{
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"evidence": "/affected/12/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-3632",
"aliases": [
"UBUNTU-CVE-2026-3632"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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"modified": "2026-10-22T04:30:58.407559778Z",
"provider": "osv",
"upstream": [
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],
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]
},
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"evidence": "/upstream"
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},
"source_id": "core-osv",
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"published_at": "2026-03-17T10:16:00+00:00"
}