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.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20354-1 advisory.

    - CVE-2025-4476: null pointer dereference may lead to denial of service (bsc#1243422).
    - CVE-2025-14523: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (bsc#1254876).
    - CVE-2025-32049: Denial of Service attack to websocket server (bsc#1240751).
    - CVE-2026-0716: improper bounds handling may allow out-of-bounds read (bsc#1256418).
    - CVE-2026-0719: stack-based buffer overflow in NTLM authentication can lead to arbitrary code execution     (bsc#1256399).
    - CVE-2026-1467: lack of input sanitization can lead to unintended or unauthorized HTTP requests     (bsc#1257398).
    - CVE-2026-1539: proxy authentication credentials leaked via the Proxy-Authorization header when handling     HTTP redirects       (bsc#1257441).
    - CVE-2026-1760: improper handling of HTTP requests combining certain headers by SoupServer can lead to     HTTP request       smuggling and potential DoS (bsc#1257597).
    - CVE-2026-2369: Buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0834-1 advisory.

    - CVE-2025-32049: denial of service attack to websocket server (bsc#1240751).
    - CVE-2026-1467: lack of input sanitization can lead to unintended or unauthorized HTTP requests     (bsc#1257398).
    - CVE-2026-1539: proxy authentication credentials leaked via the Proxy-Authorization header when handling     HTTP redirects       (bsc#1257441).
    - CVE-2026-1760: improper handling of HTTP requests combining certain headers by SoupServer can lead to     HTTP request       smuggling and potential DoS (bsc#1257597).
    - CVE-2026-2369: buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0703-1 advisory.

    - CVE-2026-0716: improper bounds handling may allow out-of-bounds read (bsc#1256418).
    - CVE-2025-4476: null pointer dereference may lead to denial of service (bsc#1243422).
    - CVE-2025-32049: denial of Service attack to websocket server (bsc#1240751).
    - CVE-2026-2369: buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0657-1 advisory.

    - CVE-2025-32049: denial of Service attack to websocket server (bsc#1240751).
    - CVE-2026-2369: buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0690-1 advisory.

    - CVE-2025-32049: denial of Service attack to websocket server (bsc#1240751).
    - CVE-2026-2369: buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0689-1 advisory.

    - CVE-2025-32049: denial of Service attack to websocket server (bsc#1240751).
    - CVE-2026-2369: buffer overread due to integer underflow when handling zero-length resources     (bsc#1258120).
    - CVE-2026-2443: out-of-bounds read when processing specially crafted HTTP Range headers can lead to heap     information       disclosure to remote attackers (bsc#1258170).
    - CVE-2026-2708: HTTP request smuggling via duplicate Content-Length headers (bsc#1258508).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-2443)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
302341	openSUSE 16 Security Update : libsoup2 (openSUSE-SU-2026:20354-1)	Nessus	SuSE Local Security Checks	high
301458	SUSE SLES15 Security Update : libsoup2 (SUSE-SU-2026:0834-1)	Nessus	SuSE Local Security Checks	high
300651	SUSE SLES12 Security Update : libsoup (SUSE-SU-2026:0703-1)	Nessus	SuSE Local Security Checks	medium
300582	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libsoup2 (SUSE-SU-2026:0657-1)	Nessus	SuSE Local Security Checks	high
300249	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libsoup (SUSE-SU-2026:0690-1)	Nessus	SuSE Local Security Checks	high
300248	SUSE SLES15 Security Update : libsoup (SUSE-SU-2026:0689-1)	Nessus	SuSE Local Security Checks	high
299000	Linux Distros Unpatched Vulnerability : CVE-2026-2443	Nessus	Misc.	medium

Detections

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CVE-2026-2443

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Tenable Plugins

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high

medium