TI-2026-05547 Aliases CVE-2026-6324 GHSA-2637-3gxc-qg4f

Libsoup: libsoup: http request smuggling via unsigned to signed conversion error

MEDIUM 55CWE-444Published 2026-05-29 · Updated 2026-11-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Low · Low · None
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01315 70th percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Red Hat	Red Hat Enterprise Linux 10	—	—	No fix listed	CNA
Red Hat	Red Hat Enterprise Linux 6	—	—	No fix listed	CNA
Red Hat	Red Hat Enterprise Linux 7	—	—	No fix listed	CNA
Red Hat	Red Hat Enterprise Linux 8	—	—	No fix listed	CNA
Red Hat	Red Hat Enterprise Linux 9	—	—	No fix listed	CNA

Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 5

CPE	Versions	Role	Vendor
cpe:/a:redhat:enterprise_linux:10	10	—	Red Hat
cpe:/o:redhat:rhel_els:6	6	—	Red Hat
cpe:/o:redhat:rhel_els:7	7	—	Red Hat
cpe:/a:redhat:enterprise_linux:8	8	—	Red Hat
cpe:/a:redhat:enterprise_linux:9	9	—	Red Hat

cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-6324
2026-10-03 Alias added: GHSA-2637-3gxc-qg4f
2026-10-08 EPSS moved to the 50th–90th percentile
2026-11-03 Affected versions changed · CNA
2026-11-03 1 new reference · CNA
2026-11-03 Affected versions changed · Red Hat

References

Other 4

TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8

See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences