What’s Vulnerable › Vulnerabilities

CVE-2026-2443: Libsoup: out-of-bounds read in libsoup handle_partial_get() leading to heap information disclosure

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-13 · updated 2026-06-17
• Weakness: CWE-125

Description

A flaw was identified in libsoup, a widely used HTTP library in GNOME-based systems. When processing specially crafted HTTP Range headers, the library may improperly validate requested byte ranges. In certain build configurations, this could allow a remote attacker to access portions of server memory beyond the intended response. Exploitation requires a vulnerable configuration and access to a server using the embedded SoupServer component.

Affected products

• GNOME libsoup: all versions
• Red Hat Enterprise Linux: 6.0, 7.0, 8.0, 9.0, 10.0

References

• https://access.redhat.com/security/cve/CVE-2026-2443
• https://bugzilla.redhat.com/show_bug.cgi?id=2439671
• https://gitlab.gnome.org/GNOME/libsoup/-/issues/487

Get alerted when CVE-2026-2443 or the next vulnerability affects your stack