CVE-2026-5119

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When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. 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"status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "libsoup", "defaultStatus": "unknown", "cpes": ["cpe:/o:redhat:rhel_els:6"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:13978", "name": "RHSA-2026:13978", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:14087", "name": "RHSA-2026:14087", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:15968", "name": "RHSA-2026:15968", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:17482", "name": "RHSA-2026:17482", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:19143", "name": "RHSA-2026:19143", "tags": 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tunnels are trusted and operate within a secure network. Avoid configuring applications to use untrusted HTTP proxies. If feasible, configure applications to bypass proxies for sensitive connections or utilize a secure proxy solution that encrypts the entire communication channel. A service restart or application reload may be required for changes to take effect."}], "timeline": [{"lang": "en", "time": "2026-03-30T05:15:27.541Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-03-30T05:30:32.610Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Kona Arctic for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-05T21:17:48.200Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-30T16:00:52.017996Z", "id": "CVE-2026-5119", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-30T16:01:02.216Z"}}]}}

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Un atacante posicionado en la red o un proxy HTTP malicioso puede interceptar estas cookies, lo que podr\u00eda conducir al secuestro potencial de la sesi\u00f3n o a la suplantaci\u00f3n de identidad del usuario."}], "id": "CVE-2026-5119", "lastModified": "2026-11-05T22:18:49.413", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 4.2, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5119", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-30T16:00:52.017996Z", "version": "2.0.3"}}]}, "published": "2026-03-30T07:15:58.350", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:13978"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:14087"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:15968"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:17482"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:19143"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:19356"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:21686"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:22316"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:22317"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:22323"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:22710"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:22716"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:24344"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:24722"}, {"source": "secalert@redhat.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-5119"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452932"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Issue Tracking"], "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/502"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-319"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Kona Arctic for reporting this issue.", "bugzilla": {"description": "libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment", "id": "2452932", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452932"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N", "status": "draft"}, "cwe": "CWE-319", "details": ["A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that all HTTP proxies used for HTTPS tunnels are trusted and operate within a secure network. Avoid configuring applications to use untrusted HTTP proxies. If feasible, configure applications to bypass proxies for sensitive connections or utilize a secure proxy solution that encrypts the entire communication channel. A service restart or application reload may be required for changes to take effect."}, "name": "CVE-2026-5119", "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": "Out of support scope", "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": "2026-03-30T05:30:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-5119\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-5119\nhttps://gitlab.gnome.org/GNOME/libsoup/-/issues/502"], "statement": "Moderate impact. This flaw in libsoup allows sensitive session cookies to be transmitted in cleartext within the initial HTTP CONNECT request when establishing HTTPS tunnels through a configured HTTP proxy. A network-positioned attacker or a malicious HTTP proxy could intercept these cookies, potentially leading to session hijacking or user impersonation. This affects Red Hat Enterprise Linux systems configured to use an HTTP proxy for HTTPS connections.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-04-02T04:58:50.960611+00:00", "value": {"mitigation_remediation": ["Apply the latest Red\u202fHat security updates for libsoup to eliminate the flaw", "Configure applications to avoid using untrusted HTTP proxies for HTTPS tunneling", "Where feasible, bypass proxies for sensitive connections or use a secure proxy that encrypts the entire communication channel", "Restart or reload affected services so the configuration changes take effect", "Monitor network traffic for cleartext transmission of session cookies"], "summary": {"action": "Apply Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Red\u202fHat Enterprise Linux releases 6 through 10 that utilize libsoup. All packages derived from these RHEL distributions could inherit the flaw, as no specific libsoup version is cited. The issue is also known in the GNOME libsoup component, but the primary impact is on RHEL users.", "description_and_impact": "A flaw in the libsoup library causes sensitive session cookies to be sent in cleartext when establishing HTTPS tunnels through a configured HTTP proxy. The cleartext cookie data is included in the initial HTTP CONNECT request. An attacker positioned on the network or operating a malicious proxy could intercept these cookies, enabling session hijacking or user impersonation. The weakness is categorized as CWE\u2011319, which highlights the exposure of cryptographic keys or secrets over an insecure channel.", "risk_and_exploitability": "The CVSS score of 5.9 indicates moderate severity. The EPSS score is below 1\u202f%, suggesting a low likelihood of exploitation in the wild at this time, and the vulnerability is not listed in CISA\u2019s Known Exploited Vulnerabilities catalog. The likely attack vector is a network-positioned attacker able to observe or control the HTTP proxy traffic. While exploitation requires the attacker to either compromise or proxy the HTTPS tunnel, it can be performed by a malicious or misconfigured proxy, which is inferred from the description."}}}}, "created": "2026-03-30T07:59:09.025805+00:00", "updated": "2026-04-02T07:54:23.685426+00:00", "vendors": ["redhat", "redhat$PRODUCT$enterprise_linux"]}