CVE-2026-6324— Libsoup: libsoup: http request smuggling via unsigned to signed conversion error
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
libsoup是GNOME项目的一款GNOME的HTTP客户端/服务器库。 libsoup存在安全漏洞，该漏洞源于soup_body_input_stream_read_chunked函数中存在无符号到有符号转换错误，可能导致远程攻击者通过发送恶意HTTP请求绕过安全控制、污染Web缓存或获得未授权访问。
Possible ATT&CK Techniques 2 AI
T1557 · Adversary-in-the-Middle T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 5
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 7 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 8 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 9 | any |
unknown |
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I. Basic Information for CVE-2026-6324
Vulnerability Information
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Vulnerability Title
Libsoup: libsoup: http request smuggling via unsigned to signed conversion error
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `soup_body_input_stream_read_chunked()` function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
libsoup 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsoup是GNOME项目的一款GNOME的HTTP客户端/服务器库。 libsoup存在安全漏洞，该漏洞源于soup_body_input_stream_read_chunked函数中存在无符号到有符号转换错误，可能导致远程攻击者通过发送恶意HTTP请求绕过安全控制、污染Web缓存或获得未授权访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
II. Public POCs for CVE-2026-6324
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-6324 (1)
Vendor Advisories for CVE-2026-6324 (2)
-
-
🔗 2458479 – (CVE-2026-6324) CVE-2026-6324 libsoup: libsoup: HTTP Request Smuggling via Unsigned to Signed Conversion Error Read full article issue-tracking x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-05-29 · 6 CVEs total
| CVE-2026-42965 | 7.7 HIGH | Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypas |
| CVE-2026-46579 | 7.4 HIGH | Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl- |
| CVE-2026-10101 | 6.3 MEDIUM | Assisted-service: assisted-service: infraenv status leaks referenced pull-secret contents |
| CVE-2026-10052 | 4.1 MEDIUM | Quay/config-tool: quay/config-tool: ssrf via unfiltered ldap and smtp config validation en |
| CVE-2026-10078 | 2.7 LOW | Quay/config-tool: quay/config-tool: gitlab oauth client_secret exposed in url querystring |
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Same weakness: CWE-444
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V. Comments for CVE-2026-6324
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