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      "text": "Medium"
    },
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    "distribution": {
      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
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      "id": "CVE-2026-5545-ELS_OS-ORACLELINUX7ELS",
      "initial_release_date": "2026-05-13T13:01:00Z",
      "revision_history": [
        {
          "date": "2026-05-13T13:01:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-05-14T12:34:44Z",
          "number": "2",
          "summary": "Official Publication"
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        {
          "date": "2026-05-14T23:49:59Z",
          "number": "3",
          "summary": "Update document"
        }
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      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-5545"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-5545",
      "cwe": {
        "id": "CWE-613",
        "name": "Insufficient Session Expiration"
      },
      "notes": [
        {
          "category": "description",
          "text": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo an authenticated HTTP(S) request after a Negotiate-authenticated one, when\nboth use the same host.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different credentials.\n\nAn application that first uses Negotiate authentication to a server with\n`user1:password1` and then does another operation to the same server asking\nfor any authentication method but for `user2:password2` (while the previous\nconnection is still alive) - the second request gets confused and wrongly\nreuses the same connection and sends the new request over that connection\nthinking it uses a mix of user1's and user2's credentials when it is in fact\nstill using the connection authenticated for user1...",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "Oracle-Linux-7:libcurl-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.x86_64",
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          "Oracle-Linux-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.x86_64",
          "Oracle-Linux-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.x86_64"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-5545"
        },
        {
          "category": "external",
          "summary": "https://curl.se/docs/CVE-2026-5545.html",
          "url": "https://curl.se/docs/CVE-2026-5545.html"
        },
        {
          "category": "external",
          "summary": "https://curl.se/docs/CVE-2026-5545.json",
          "url": "https://curl.se/docs/CVE-2026-5545.json"
        },
        {
          "category": "external",
          "summary": "https://hackerone.com/reports/3642555",
          "url": "https://hackerone.com/reports/3642555"
        }
      ],
      "release_date": "2026-05-13T13:01:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-05-14T20:47:42.043911Z",
          "details": "Deprioritize: this flaw only manifests when libcurl uses Negotiate (Kerberos/SPNEGO) and reuses a still‑alive connection to the same host while the application immediately issues another request with different credentials; Negotiate must be explicitly enabled or selected via “any” authentication, which is not libcurl’s default. It is a client‑side credential mix‑up with high exploitation complexity—no code execution or privilege escalation—and would require an actor to control the client’s request sequencing and identities to gain advantage. In centrally managed server/VM workloads that use a single service identity per upstream endpoint and avoid interleaving user contexts on a shared libcurl handle, the preconditions do not occur, making this a low‑priority risk.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          },
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          "category": "impact",
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}