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Vulnerability · Published Feb 13, 2026 · Assigned by redhat

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

Medium 5.3

In plain English

A medium-severity out-of-bounds read in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 57.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libsoup2.4no fix listedDEBIAN-CVE-2026-2443
Debian:13libsoup2.4no fix listedDEBIAN-CVE-2026-2443
Debian:12libsoup3no fix listedDEBIAN-CVE-2026-2443
Debian:13libsoup3no fix listedDEBIAN-CVE-2026-2443
Ubuntu:22.04:LTSlibsoup2.4no fix listedUBUNTU-CVE-2026-2443
Ubuntu:24.04:LTSlibsoup2.4no fix listedUBUNTU-CVE-2026-2443
Ubuntu:25.10libsoup2.4no fix listedUBUNTU-CVE-2026-2443
Ubuntu:26.10libsoup2.4no fix listedUBUNTU-CVE-2026-2443
Ubuntu:24.04:LTSlibsoup3no fix listedUBUNTU-CVE-2026-2443
Ubuntu:25.10libsoup3no fix listedUBUNTU-CVE-2026-2443

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References