{"schema_version":"1.7.2","id":"OESA-2026-4127","modified":"2026-09-25T01:28:47Z","published":"2026-09-25T01:28:47Z","upstream":["CVE-2026-11856","CVE-2026-13608","CVE-2026-18924","CVE-2026-19931","CVE-2026-80230","CVE-2026-80231","CVE-2026-82209"],"summary":"curl security update","details":"cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.\r\n\r\nSecurity Fix(es):\n\nSuccessfully using libcurl to do a transfer to a specific HTTP origin\n(`hostA`) with **Digest** authentication and then changing the origin to a\ndifferent one (`hostB`) for a second transfer, reusing the same handle, makes\nlibcurl wrongly pass on the `Authorization:` header field meant for `hostA`,\nto `hostB`.(CVE-2026-11856)\n\nA flaw in the libcurl SASL negotiation for LDAP authentication allows an\nincomplete handshake sequence to be misinterpreted as a successful\ncryptographic verification. An attacker executing a Man-in-the-Middle (MITM)\nattack can inject a premature or shortcut response that bypasses complete peer\nvalidation.(CVE-2026-13608)\n\nA flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent\nhandle is set to share connections with other handles, can lead to\nuse-after-free in the cleanup process.(CVE-2026-18924)\n\nA flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given\nhostname using Negotiate authentication, when the initial request is done\nusing empty credentials. This can make user B's request get sent over user A's\npreviously authenticated connection.(CVE-2026-19931)\n\nWhen `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable\nstandard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and\n`CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on\nconnections established without a presented server certificate. Bypassing the\npinning check under these disabled-verification conditions allows\nunauthenticated connections to succeed when they should be rejected.(CVE-2026-80230)\n\nA flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup\nfor a given hostname even when using a different Native CA Store setting\n(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.(CVE-2026-80231)\n\nWhen libpsl support is enabled, libcurl fails to enforce the Public Suffix\nList boundary check when processing a `Set-Cookie` header where the `Domain`\nattribute explicitly matches an origin host that is itself a public suffix\n(e.g., `Domain=co.uk` set by `co.uk`).\n\nInstead of coercing it into a strict host-only cookie, libcurl saves the\ncookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is\ninappropriately included in subsequent outbound requests or HTTP redirects to\narbitrary sibling subdomains under the same public suffix (e.g.,\n`attacker.co.uk`).(CVE-2026-82209)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"curl","purl":"pkg:rpm/openEuler/curl&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.4.0-37.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["curl-8.4.0-37.oe2403sp3.aarch64.rpm","curl-debuginfo-8.4.0-37.oe2403sp3.aarch64.rpm","curl-debugsource-8.4.0-37.oe2403sp3.aarch64.rpm","libcurl-8.4.0-37.oe2403sp3.aarch64.rpm","libcurl-devel-8.4.0-37.oe2403sp3.aarch64.rpm"],"noarch":["curl-help-8.4.0-37.oe2403sp3.noarch.rpm"],"src":["curl-8.4.0-37.oe2403sp3.src.rpm"],"x86_64":["curl-8.4.0-37.oe2403sp3.x86_64.rpm","curl-debuginfo-8.4.0-37.oe2403sp3.x86_64.rpm","curl-debugsource-8.4.0-37.oe2403sp3.x86_64.rpm","libcurl-8.4.0-37.oe2403sp3.x86_64.rpm","libcurl-devel-8.4.0-37.oe2403sp3.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4127"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11856"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13608"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18924"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19931"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80230"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80231"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82209"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"Critical"}}