CVE-2026-2443

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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."}, {"lang": "es", "value": "Se identific\u00f3 una vulnerabilidad en libsoup, una librer\u00eda HTTP ampliamente utilizada en sistemas basados en GNOME. Al procesar encabezados HTTP Range especialmente dise\u00f1ados, la librer\u00eda podr\u00eda validar incorrectamente los rangos de bytes solicitados. En ciertas configuraciones de compilaci\u00f3n, esto podr\u00eda permitir a un atacante remoto acceder a porciones de la memoria del servidor m\u00e1s all\u00e1 de la respuesta prevista. La explotaci\u00f3n requiere una configuraci\u00f3n vulnerable y acceso a un servidor que utilice el componente SoupServer incrustado."}], "id": "CVE-2026-2443", "lastModified": "2026-11-06T19:17:49.060", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2443", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-13T12:40:40.304156Z", "version": "2.0.3"}}]}, "published": "2026-02-13T12:16:09.107", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-2443"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439671"}, {"source": "secalert@redhat.com", "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/487"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Codean Labs for reporting this issue.", "bugzilla": {"description": "libsoup: Out-of-Bounds Read in libsoup handle_partial_get() Leading to Heap Information Disclosure", "id": "2439671", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439671"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["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."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-2443", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libsoup3", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2443\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2443"], "statement": "This issue has a LOW impact. An out-of-bounds read vulnerability in libsoup, when processing HTTP Range headers, can lead to heap information disclosure. Although upstream exploitation may allow disclosure of heap memory contents, Red Hat does not build GLib with G_DISABLE_CHECKS, which prevents creation of out-of-bounds byte slices in supported products. As a result, the risk of meaningful information disclosure in shipped configurations is limited. The issue primarily affects applications exposing the SoupServer component and processing untrusted HTTP Range headers.", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "product": "enterprise_linux", "vendor": "red_hat"}], "analysis": {"en": {"generated_at": "2026-04-16T06:51:31.475743+00:00", "value": {"mitigation_remediation": ["Install the latest Red\u202fHat Enterprise\u202fLinux update that includes the patched libsoup library.", "If an update cannot be applied immediately, disable or limit the use of the SoupServer component or block HTTP Range header processing on the affected services.", "Subscribe to Red\u202fHat Security Advisories and apply fixes as soon as they become available."], "summary": {"action": "Apply update", "impact": "Potential disclosure of heap memory contents via an out\u2011of\u2011bounds read in libsoup's handle_partial_get()"}, "threat_synthesis": {"affected_systems": "The vulnerability affects all supported Red\u202fHat Enterprise\u202fLinux releases from 6 through 10, as these systems embed the affected libsoup library. It also impacts any GNOME\u2011based installations that incorporate the vulnerable libsoup component. Users of these operating systems or applications relying on libsoup should verify whether the library has been updated to the patched revision.", "description_and_impact": "An out\u2011of\u2011bounds read flaw exists in libsoup, the HTTP library used in GNOME\u2011based systems. By sending specially crafted HTTP Range headers, a remote attacker can cause the library to improperly validate byte ranges and read memory beyond the intended server response. This allows the attacker to exfiltrate portions of server heap memory, potentially leaking sensitive data.", "risk_and_exploitability": "The CVSS score is 5.3, indicating moderate severity, while the EPSS score is less than 1\u202f%, suggesting a low probability of exploitation at the time of this assessment. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires an attacker to reach a server running the vulnerable SoupServer component and the ability to send crafted HTTP requests. Because the flaw is limited to memory disclosure rather than remote code execution, the overall impact is primarily confidentiality compromise, with modest complexity for an attacker."}}}}, "created": "2026-02-13T21:28:41.723730+00:00", "updated": "2026-04-16T07:00:10.982789+00:00", "vendors": ["red_hat", "red_hat$PRODUCT$enterprise_linux"]}