SUSE-SU-2026:21452-1

Vulnerability from csaf_suse - Published: 2026-04-30 14:46 - Updated: 2026-04-30 14:46
Summary
Security update for curl
Severity
Important
Notes
Title of the patch: Security update for curl
Description of the patch: This update for curl fixes the following issues: Security issues fixed: - CVE-2026-4873: connection reuse ignores TLS requirement (bsc#1262631). - CVE-2026-5545: wrong reuse of HTTP Negotiate connection (bsc#1262632). - CVE-2026-6253: proxy credentials leak over redirect-to proxy (bsc#1262635). - CVE-2026-6276: stale custom cookie host causes cookie leak (bsc#1262636). - CVE-2026-6429: netrc credential leak with reused proxy connection (bsc#1262638). Other updates and bugfixes: - sws: prevent "connection monitor" to say disconnect twice (bsc#1259362).
Patchnames: SUSE-SLE-Micro-6.1-517
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-1965
7.5 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-4873
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact low
CVE-2026-5545
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact moderate
CVE-2026-6253
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact moderate
CVE-2026-6276
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact low
CVE-2026-6429
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64 —
Vendor Fix
Threats
Impact moderate
References
To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-1965",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-1965"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libcurl can in some circumstances reuse the wrong connection when asked to do\nan Negotiate-authenticated HTTP or HTTPS request.\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 criterion must first be met. Due to a\nlogical error 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. One underlying reason being that\nNegotiate sometimes authenticates *connections* and not *requests*, contrary\nto how HTTP is designed to work.\n\nAn application that allows Negotiate authentication to a server (that responds\nwanting Negotiate) with `user1:password1` and then does another operation to\nthe same server also using Negotiate but with `user2:password2` (while the\nprevious connection is still alive) - the second request wrongly reused the\nsame connection and since it then sees that the Negotiate negotiation is\nalready made, it just sends the request over that connection thinking it uses\nthe user2 credentials when it is in fact still using the connection\nauthenticated for user1...\n\nThe set of authentication methods to use is set with  `CURLOPT_HTTPAUTH`.\n\nApplications can disable libcurl\u0027s reuse of connections and thus mitigate this\nproblem, by using one of the following libcurl options to alter how\nconnections are or are not reused: `CURLOPT_FRESH_CONNECT`,\n`CURLOPT_MAXCONNECTS` and `CURLMOPT_MAX_HOST_CONNECTIONS` (if using the\ncurl_multi API).",
          "title": "CVE description"
        }
      ],
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-1965",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1259362 for CVE-2026-1965",
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      ],
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        {
          "category": "vendor_fix",
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        }
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        {
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            "baseScore": 7.5,
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-30T14:46:10Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-1965"
    },
    {
      "cve": "CVE-2026-4873",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4873"
        }
      ],
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        {
          "category": "general",
          "text": "unknown",
          "title": "CVE description"
        }
      ],
      "product_status": {
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4873",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1262631 for CVE-2026-4873",
          "url": "https://bugzilla.suse.com/1262631"
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      ],
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        {
          "category": "vendor_fix",
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        }
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        {
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            "baseScore": 3.7,
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        {
          "category": "impact",
          "date": "2026-04-30T14:46:10Z",
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      ],
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    },
    {
      "cve": "CVE-2026-5545",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5545"
        }
      ],
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        {
          "category": "general",
          "text": "unknown",
          "title": "CVE description"
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      ],
      "product_status": {
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      "references": [
        {
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          "summary": "CVE-2026-5545",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1262632 for CVE-2026-5545",
          "url": "https://bugzilla.suse.com/1262632"
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        {
          "category": "vendor_fix",
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        }
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            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.aarch64",
            "SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.ppc64le",
            "SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.s390x",
            "SUSE Linux Micro 6.1:curl-8.14.1-slfo.1.1_7.1.x86_64",
            "SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.aarch64",
            "SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.ppc64le",
            "SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.s390x",
            "SUSE Linux Micro 6.1:libcurl4-8.14.1-slfo.1.1_7.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-30T14:46:10Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-6429"
    }
  ]
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.