RHSA-2026:55439
Vulnerability from csaf_opensuse - Published: 2026-08-17 00:00 - Updated: 2026-09-15 16:06Summary
security update for curl
Severity
Important
Notes
Title of the patch: security update for curl
Description of the patch: This security update provides a functional equivalent of RHSA-2026:55439.
The original Red Hat(R) advisory is available from the Red Hat web site at
https://access.redhat.com/errata/RHSA-2026:55439.
Patchnames: RHSA-2026:55439
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.5 (High)
Affected products
Recommended
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
4.7 (Medium)
Affected products
Recommended
8 products, the same list as for
CVE-2026-1965
Threats
Impact
moderate
7.4 (High)
Affected products
Recommended
8 products, the same list as for
CVE-2026-1965
Threats
Impact
important
7.4 (High)
Affected products
Recommended
8 products, the same list as for
CVE-2026-1965
Threats
Impact
important
References
17 references
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"notes": [
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"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 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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"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"text": "https://www.suse.com/security/cve/CVE-2026-3783"
}
],
"notes": [
{
"category": "general",
"text": "When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer\nperforms a redirect to a second URL, curl could leak that token to the second\nhostname under some circumstances.\n\nIf the hostname that the first request is redirected to has information in the\nused .netrc file, with either of the `machine` or `default` keywords, curl\nwould pass on the bearer token set for the first host also to the second one.",
"title": "CVE description"
}
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},
{
"cve": "CVE-2026-8286",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-8286"
}
],
"notes": [
{
"category": "general",
"text": "A vulnerability exists where a new transfer that uses STARTTLS to upgrade the\nconnection might reuse an existing live connection even though the TLS\nconfiguration mismatches so it should not.",
"title": "CVE description"
}
],
"product_status": {
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}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-08-17T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-8286"
},
{
"cve": "CVE-2026-9547",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-9547"
}
],
"notes": [
{
"category": "general",
"text": "When a libcurl-based application performs transfers via `SCP://` or `SFTP://`\nand utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an\nuntrusted server. This vulnerability occurs when a server presents a host key\ntype that does not match the specific key type already recorded for that host\nin the `known_hosts` file. Instead of rejecting the mismatch, the callback\nmechanism fails to properly enforce the restriction, allowing the connection\nto succeed without warning and risking a potential man-in-the-middle attack.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-9547",
"url": "https://www.suse.com/security/cve/CVE-2026-9547"
},
{
"category": "external",
"summary": "SUSE Bug 1268420 for CVE-2026-9547",
"url": "https://bugzilla.suse.com/1268420"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"SUSE Liberty Linux 9:curl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:curl-minimal-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-devel-7.76.1-40.el9_8.5.x86_64",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.i686",
"SUSE Liberty Linux 9:libcurl-minimal-7.76.1-40.el9_8.5.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-08-17T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-9547"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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