CVE-2026-1539

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Las aplicaciones que usan libsoup para comunicaci\u00f3n HTTP pueden exponer involuntariamente datos de autenticaci\u00f3n de proxy."}], "id": "CVE-2026-1539", "lastModified": "2026-11-05T17:18:16.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-2026-1539", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-28T16:09:01.060307Z", "version": "2.0.3"}}]}, "published": "2026-01-28T16:16:16.687", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-1539"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/489"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-201"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Codean Labs for reporting this issue.", "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-201", "details": ["A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data."], "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-2026-1539", "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": "2026-01-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-1539\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-1539"], "statement": "The Red Hat Product Security team has assessed the severity of this vulnerability as Medium. Exploitation requires network access but does not require authentication, user interaction, or special privileges. Successful exploitation may result in the disclosure of proxy authentication credentials to unintended third parties. While the issue does not directly allow code execution or service disruption, leakage of authentication material represents a meaningful confidentiality risk. The root cause is improper handling of sensitive headers during HTTP redirect processing.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-16T07:15:22.331724+00:00", "value": {"mitigation_remediation": ["Install the latest RHEL update that includes the patched libsoup version", "If a patch is not yet available, disable Proxy\u2011Authorization headers in client configuration or use direct connections during redirects", "Implement network monitoring to detect outbound proxy credentials sent to unknown hosts", "Consult Red\u00a0Hat support for guidance and potential workarounds"], "summary": {"action": "Patch When Available", "impact": "Credential Leakage via Proxy Authentication Headers"}, "threat_synthesis": {"affected_systems": "Red\u00a0Hat Enterprise\u00a0Linux 10 through 9 are impacted, as the underlying libsoup ABI is included in those distributions. The issue also affects any applications linked against the GNOME libsoup library. Versions of the library that coincide with the RHEL releases that ship before the fix are vulnerable.", "description_and_impact": "The flaw exists in libsoup, the HTTP library used by many Red\u00a0Hat products. During an HTTP redirect, the library removes the user Authorization header but mistakenly keeps the Proxy\u2011Authorization header when the target host changes. This allows proxy credentials to be forwarded to third\u2011party servers. The vulnerability can expose sensitive authentication credentials, compromising the confidentiality of proxy traffic, and can be exploited by an attacker who can influence the redirect target. This is a credential leakage flaw classified as CWE\u2011201.", "risk_and_exploitability": "The CVSS base score is 5.8, indicating moderate severity. The EPSS score is below 1\u202f%, suggesting a low probability of exploitation in the wild, and it is not listed in the CISA KEV catalog. Still, an attacker who can direct a user through a malicious proxy or control redirect responses could cause credential leakage. The exploit requires network access to produce redirects and the victim to use a proxy that involves the vulnerable libsoup library."}}}}, "created": "2026-04-16T07:15:28.179425+00:00", "updated": "2026-04-16T07:15:28.179436+00:00", "vendors": []}