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CERTFR-2026-AVI-0269
Vulnerability from certfr_avis - Published: 2026-03-11 - Updated: 2026-03-11
De multiples vulnérabilités ont été découvertes dans Curl. Elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Curl | cURL et libcurl | Curl versions antérieures à 8.19.0 |
References
| Title | Publication Time | Tags | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Curl versions ant\u00e9rieures \u00e0 8.19.0",
"product": {
"name": "cURL et libcurl",
"vendor": {
"name": "Curl",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-1965",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-1965"
},
{
"name": "CVE-2026-3783",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-3783"
},
{
"name": "CVE-2026-3805",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-3805"
},
{
"name": "CVE-2026-3784",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-3784"
}
],
"initial_release_date": "2026-03-11T00:00:00",
"last_revision_date": "2026-03-11T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0269",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-03-11T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Curl. Elles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0 distance, une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Curl",
"vendor_advisories": [
{
"published_at": "2026-03-11",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-3805",
"url": "https://curl.se/docs/CVE-2026-3805.html"
},
{
"published_at": "2026-03-11",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-1965",
"url": "https://curl.se/docs/CVE-2026-1965.html"
},
{
"published_at": "2026-03-11",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-3784",
"url": "https://curl.se/docs/CVE-2026-3784.html"
},
{
"published_at": "2026-03-11",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-3783",
"url": "https://curl.se/docs/CVE-2026-3783.html"
}
]
}
CVE-2026-1965 (GCVE-0-2026-1965)
Vulnerability from cvelistv5 – Published: 2026-03-11 10:08 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
bad reuse of HTTP Negotiate connection
Summary
libcurl can in some circumstances reuse the wrong connection when asked to do
an Negotiate-authenticated HTTP or HTTPS request.
libcurl features a pool of recent connections so that subsequent requests can
reuse an existing connection to avoid overhead.
When reusing a connection a range of criterion must first be met. Due to a
logical error in the code, a request that was issued by an application could
wrongfully reuse an existing connection to the same server that was
authenticated using different credentials. One underlying reason being that
Negotiate sometimes authenticates *connections* and not *requests*, contrary
to how HTTP is designed to work.
An application that allows Negotiate authentication to a server (that responds
wanting Negotiate) with `user1:password1` and then does another operation to
the same server also using Negotiate but with `user2:password2` (while the
previous connection is still alive) - the second request wrongly reused the
same connection and since it then sees that the Negotiate negotiation is
already made, it sends the request over that connection thinking it uses
the user2 credentials when it is in fact still using the connection
authenticated for user1...
The set of authentication methods to use is set with `CURLOPT_HTTPAUTH`.
Applications can disable libcurl's reuse of connections and thus mitigate this
problem, by using one of the following libcurl options to alter how
connections are or are not reused: `CURLOPT_FRESH_CONNECT`,
`CURLOPT_MAXCONNECTS` and `CURLMOPT_MAX_HOST_CONNECTIONS` (if using the
curl_multi API).
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 14:31 UTC
CWE
- CWE-305 - Authentication Bypass by Primary Weakness
Assigner
References
2 references
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.10.6 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.19.0 (semver) |
|
| curl | curl |
Affected:
e56ae1426cb7a0a4a427cf8d6099a821fdaae428 , < f1a39f221d57354990e3eeeddc3404aede2aff70
(git)
|
|
| curl | curl |
Affected:
8.18.0
Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0 Affected: 7.70.0 Affected: 7.69.1 Affected: 7.69.0 Affected: 7.68.0 Affected: 7.67.0 Affected: 7.66.0 Affected: 7.65.3 Affected: 7.65.2 Affected: 7.65.1 Affected: 7.65.0 Affected: 7.64.1 Affected: 7.64.0 Affected: 7.63.0 Affected: 7.62.0 Affected: 7.61.1 Affected: 7.61.0 Affected: 7.60.0 Affected: 7.59.0 Affected: 7.58.0 Affected: 7.57.0 Affected: 7.56.1 Affected: 7.56.0 Affected: 7.55.1 Affected: 7.55.0 Affected: 7.54.1 Affected: 7.54.0 Affected: 7.53.1 Affected: 7.53.0 Affected: 7.52.1 Affected: 7.52.0 Affected: 7.51.0 Affected: 7.50.3 Affected: 7.50.2 Affected: 7.50.1 Affected: 7.50.0 Affected: 7.49.1 Affected: 7.49.0 Affected: 7.48.0 Affected: 7.47.1 Affected: 7.47.0 Affected: 7.46.0 Affected: 7.45.0 Affected: 7.44.0 Affected: 7.43.0 Affected: 7.42.1 Affected: 7.42.0 Affected: 7.41.0 Affected: 7.40.0 Affected: 7.39.0 Affected: 7.38.0 Affected: 7.37.1 Affected: 7.37.0 Affected: 7.36.0 Affected: 7.35.0 Affected: 7.34.0 Affected: 7.33.0 Affected: 7.32.0 Affected: 7.31.0 Affected: 7.30.0 Affected: 7.29.0 Affected: 7.28.1 Affected: 7.28.0 Affected: 7.27.0 Affected: 7.26.0 Affected: 7.25.0 Affected: 7.24.0 Affected: 7.23.1 Affected: 7.23.0 Affected: 7.22.0 Affected: 7.21.7 Affected: 7.21.6 Affected: 7.21.5 Affected: 7.21.4 Affected: 7.21.3 Affected: 7.21.2 Affected: 7.21.1 Affected: 7.21.0 Affected: 7.20.1 Affected: 7.20.0 Affected: 7.19.7 Affected: 7.19.6 Affected: 7.19.5 Affected: 7.19.4 Affected: 7.19.3 Affected: 7.19.2 Affected: 7.19.1 Affected: 7.19.0 Affected: 7.18.2 Affected: 7.18.1 Affected: 7.18.0 Affected: 7.17.1 Affected: 7.17.0 Affected: 7.16.4 Affected: 7.16.3 Affected: 7.16.2 Affected: 7.16.1 Affected: 7.16.0 Affected: 7.15.5 Affected: 7.15.4 Affected: 7.15.3 Affected: 7.15.2 Affected: 7.15.1 Affected: 7.15.0 Affected: 7.14.1 Affected: 7.14.0 Affected: 7.13.2 Affected: 7.13.1 Affected: 7.13.0 Affected: 7.12.3 Affected: 7.12.2 Affected: 7.12.1 Affected: 7.12.0 Affected: 7.11.2 Affected: 7.11.1 Affected: 7.11.0 Affected: 7.10.8 Affected: 7.10.7 Affected: 7.10.6 |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-1965",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-11T14:31:56.061598Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-305",
"description": "CWE-305 Authentication Bypass by Primary Weakness",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-11T14:32:38.895Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"lessThan": "8.14.2",
"status": "affected",
"version": "7.10.6",
"versionType": "semver"
},
{
"lessThan": "8.16.1",
"status": "affected",
"version": "8.15.0",
"versionType": "semver"
},
{
"lessThan": "8.19.0",
"status": "affected",
"version": "8.17.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
"lessThan": "f1a39f221d57354990e3eeeddc3404aede2aff70",
"status": "affected",
"version": "e56ae1426cb7a0a4a427cf8d6099a821fdaae428",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
},
{
"status": "affected",
"version": "8.12.1"
},
{
"status": "affected",
"version": "8.12.0"
},
{
"status": "affected",
"version": "8.11.1"
},
{
"status": "affected",
"version": "8.11.0"
},
{
"status": "affected",
"version": "8.10.1"
},
{
"status": "affected",
"version": "8.10.0"
},
{
"status": "affected",
"version": "8.9.1"
},
{
"status": "affected",
"version": "8.9.0"
},
{
"status": "affected",
"version": "8.8.0"
},
{
"status": "affected",
"version": "8.7.1"
},
{
"status": "affected",
"version": "8.7.0"
},
{
"status": "affected",
"version": "8.6.0"
},
{
"status": "affected",
"version": "8.5.0"
},
{
"status": "affected",
"version": "8.4.0"
},
{
"status": "affected",
"version": "8.3.0"
},
{
"status": "affected",
"version": "8.2.1"
},
{
"status": "affected",
"version": "8.2.0"
},
{
"status": "affected",
"version": "8.1.2"
},
{
"status": "affected",
"version": "8.1.1"
},
{
"status": "affected",
"version": "8.1.0"
},
{
"status": "affected",
"version": "8.0.1"
},
{
"status": "affected",
"version": "8.0.0"
},
{
"status": "affected",
"version": "7.88.1"
},
{
"status": "affected",
"version": "7.88.0"
},
{
"status": "affected",
"version": "7.87.0"
},
{
"status": "affected",
"version": "7.86.0"
},
{
"status": "affected",
"version": "7.85.0"
},
{
"status": "affected",
"version": "7.84.0"
},
{
"status": "affected",
"version": "7.83.1"
},
{
"status": "affected",
"version": "7.83.0"
},
{
"status": "affected",
"version": "7.82.0"
},
{
"status": "affected",
"version": "7.81.0"
},
{
"status": "affected",
"version": "7.80.0"
},
{
"status": "affected",
"version": "7.79.1"
},
{
"status": "affected",
"version": "7.79.0"
},
{
"status": "affected",
"version": "7.78.0"
},
{
"status": "affected",
"version": "7.77.0"
},
{
"status": "affected",
"version": "7.76.1"
},
{
"status": "affected",
"version": "7.76.0"
},
{
"status": "affected",
"version": "7.75.0"
},
{
"status": "affected",
"version": "7.74.0"
},
{
"status": "affected",
"version": "7.73.0"
},
{
"status": "affected",
"version": "7.72.0"
},
{
"status": "affected",
"version": "7.71.1"
},
{
"status": "affected",
"version": "7.71.0"
},
{
"status": "affected",
"version": "7.70.0"
},
{
"status": "affected",
"version": "7.69.1"
},
{
"status": "affected",
"version": "7.69.0"
},
{
"status": "affected",
"version": "7.68.0"
},
{
"status": "affected",
"version": "7.67.0"
},
{
"status": "affected",
"version": "7.66.0"
},
{
"status": "affected",
"version": "7.65.3"
},
{
"status": "affected",
"version": "7.65.2"
},
{
"status": "affected",
"version": "7.65.1"
},
{
"status": "affected",
"version": "7.65.0"
},
{
"status": "affected",
"version": "7.64.1"
},
{
"status": "affected",
"version": "7.64.0"
},
{
"status": "affected",
"version": "7.63.0"
},
{
"status": "affected",
"version": "7.62.0"
},
{
"status": "affected",
"version": "7.61.1"
},
{
"status": "affected",
"version": "7.61.0"
},
{
"status": "affected",
"version": "7.60.0"
},
{
"status": "affected",
"version": "7.59.0"
},
{
"status": "affected",
"version": "7.58.0"
},
{
"status": "affected",
"version": "7.57.0"
},
{
"status": "affected",
"version": "7.56.1"
},
{
"status": "affected",
"version": "7.56.0"
},
{
"status": "affected",
"version": "7.55.1"
},
{
"status": "affected",
"version": "7.55.0"
},
{
"status": "affected",
"version": "7.54.1"
},
{
"status": "affected",
"version": "7.54.0"
},
{
"status": "affected",
"version": "7.53.1"
},
{
"status": "affected",
"version": "7.53.0"
},
{
"status": "affected",
"version": "7.52.1"
},
{
"status": "affected",
"version": "7.52.0"
},
{
"status": "affected",
"version": "7.51.0"
},
{
"status": "affected",
"version": "7.50.3"
},
{
"status": "affected",
"version": "7.50.2"
},
{
"status": "affected",
"version": "7.50.1"
},
{
"status": "affected",
"version": "7.50.0"
},
{
"status": "affected",
"version": "7.49.1"
},
{
"status": "affected",
"version": "7.49.0"
},
{
"status": "affected",
"version": "7.48.0"
},
{
"status": "affected",
"version": "7.47.1"
},
{
"status": "affected",
"version": "7.47.0"
},
{
"status": "affected",
"version": "7.46.0"
},
{
"status": "affected",
"version": "7.45.0"
},
{
"status": "affected",
"version": "7.44.0"
},
{
"status": "affected",
"version": "7.43.0"
},
{
"status": "affected",
"version": "7.42.1"
},
{
"status": "affected",
"version": "7.42.0"
},
{
"status": "affected",
"version": "7.41.0"
},
{
"status": "affected",
"version": "7.40.0"
},
{
"status": "affected",
"version": "7.39.0"
},
{
"status": "affected",
"version": "7.38.0"
},
{
"status": "affected",
"version": "7.37.1"
},
{
"status": "affected",
"version": "7.37.0"
},
{
"status": "affected",
"version": "7.36.0"
},
{
"status": "affected",
"version": "7.35.0"
},
{
"status": "affected",
"version": "7.34.0"
},
{
"status": "affected",
"version": "7.33.0"
},
{
"status": "affected",
"version": "7.32.0"
},
{
"status": "affected",
"version": "7.31.0"
},
{
"status": "affected",
"version": "7.30.0"
},
{
"status": "affected",
"version": "7.29.0"
},
{
"status": "affected",
"version": "7.28.1"
},
{
"status": "affected",
"version": "7.28.0"
},
{
"status": "affected",
"version": "7.27.0"
},
{
"status": "affected",
"version": "7.26.0"
},
{
"status": "affected",
"version": "7.25.0"
},
{
"status": "affected",
"version": "7.24.0"
},
{
"status": "affected",
"version": "7.23.1"
},
{
"status": "affected",
"version": "7.23.0"
},
{
"status": "affected",
"version": "7.22.0"
},
{
"status": "affected",
"version": "7.21.7"
},
{
"status": "affected",
"version": "7.21.6"
},
{
"status": "affected",
"version": "7.21.5"
},
{
"status": "affected",
"version": "7.21.4"
},
{
"status": "affected",
"version": "7.21.3"
},
{
"status": "affected",
"version": "7.21.2"
},
{
"status": "affected",
"version": "7.21.1"
},
{
"status": "affected",
"version": "7.21.0"
},
{
"status": "affected",
"version": "7.20.1"
},
{
"status": "affected",
"version": "7.20.0"
},
{
"status": "affected",
"version": "7.19.7"
},
{
"status": "affected",
"version": "7.19.6"
},
{
"status": "affected",
"version": "7.19.5"
},
{
"status": "affected",
"version": "7.19.4"
},
{
"status": "affected",
"version": "7.19.3"
},
{
"status": "affected",
"version": "7.19.2"
},
{
"status": "affected",
"version": "7.19.1"
},
{
"status": "affected",
"version": "7.19.0"
},
{
"status": "affected",
"version": "7.18.2"
},
{
"status": "affected",
"version": "7.18.1"
},
{
"status": "affected",
"version": "7.18.0"
},
{
"status": "affected",
"version": "7.17.1"
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}
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"description": "Authentication Bypass by Primary Weakness",
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"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T06:02:49.175Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
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"references": [
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"url": "https://curl.se/docs/CVE-2026-1965.json"
},
{
"url": "https://curl.se/docs/CVE-2026-1965.html"
}
],
"title": "bad reuse of HTTP Negotiate connection",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
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"introduced": "7.10.6"
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{
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},
{
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"aliases": [
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],
"credits": [
{
"name": "Zhicheng Chen",
"type": "finder"
},
{
"name": "Daniel Stenberg",
"type": "remediation developer"
}
],
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"desc": "Authentication Bypass by Primary Weakness",
"id": "CWE-305"
},
"URL": "https://curl.se/docs/CVE-2026-1965.json",
"affects": "both",
"last_affected": "8.18.0",
"package": "curl",
"severity": "Medium",
"www": "https://curl.se/docs/CVE-2026-1965.html"
},
"details": "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).",
"id": "CURL-CVE-2026-1965",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-03-11T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "bad reuse of HTTP Negotiate connection"
}
}
},
"cveMetadata": {
"assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"assignerShortName": "curl",
"cveId": "CVE-2026-1965",
"datePublished": "2026-03-11T10:08:52.431Z",
"dateReserved": "2026-02-05T11:00:50.882Z",
"dateUpdated": "2026-09-15T06:02:49.175Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-3783 (GCVE-0-2026-3783)
Vulnerability from cvelistv5 – Published: 2026-03-11 10:09 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
token leak with redirect and netrc
Summary
When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer
performs a redirect to a second URL, curl could leak that token to the second
hostname under some circumstances.
If the hostname that the first request is redirected to has information in the
used .netrc file, with either of the `machine` or `default` keywords, curl
would pass on the bearer token set for the first host also to the second one.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 14:25 UTC
CWE
- CWE-522 - Insufficiently Protected Credentials
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.33.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.19.0 (semver) |
|
| curl | curl |
Affected:
06c1bea72faabb6fad4b7ef818aafaa336c9a7aa , < e3d7401a32a46516c9e5ee877e613e62ed35bddc
(git)
|
|
| curl | curl |
Affected:
8.18.0
Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0 Affected: 7.70.0 Affected: 7.69.1 Affected: 7.69.0 Affected: 7.68.0 Affected: 7.67.0 Affected: 7.66.0 Affected: 7.65.3 Affected: 7.65.2 Affected: 7.65.1 Affected: 7.65.0 Affected: 7.64.1 Affected: 7.64.0 Affected: 7.63.0 Affected: 7.62.0 Affected: 7.61.1 Affected: 7.61.0 Affected: 7.60.0 Affected: 7.59.0 Affected: 7.58.0 Affected: 7.57.0 Affected: 7.56.1 Affected: 7.56.0 Affected: 7.55.1 Affected: 7.55.0 Affected: 7.54.1 Affected: 7.54.0 Affected: 7.53.1 Affected: 7.53.0 Affected: 7.52.1 Affected: 7.52.0 Affected: 7.51.0 Affected: 7.50.3 Affected: 7.50.2 Affected: 7.50.1 Affected: 7.50.0 Affected: 7.49.1 Affected: 7.49.0 Affected: 7.48.0 Affected: 7.47.1 Affected: 7.47.0 Affected: 7.46.0 Affected: 7.45.0 Affected: 7.44.0 Affected: 7.43.0 Affected: 7.42.1 Affected: 7.42.0 Affected: 7.41.0 Affected: 7.40.0 Affected: 7.39.0 Affected: 7.38.0 Affected: 7.37.1 Affected: 7.37.0 Affected: 7.36.0 Affected: 7.35.0 Affected: 7.34.0 Affected: 7.33.0 |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-03-11T10:16:31.282Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
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"url": "http://www.openwall.com/lists/oss-security/2026/03/11/2"
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],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"options": [
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{
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{
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"role": "CISA Coordinator",
"timestamp": "2026-03-11T14:25:28.836990Z",
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"type": "ssvc"
}
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],
"problemTypes": [
{
"descriptions": [
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"versionType": "git"
}
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{
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"status": "affected",
"version": "8.18.0"
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"status": "affected",
"version": "8.17.0"
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{
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"version": "8.6.0"
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{
"status": "affected",
"version": "8.5.0"
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{
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{
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"version": "8.3.0"
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{
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"status": "affected",
"version": "7.79.1"
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"status": "affected",
"version": "7.79.0"
},
{
"status": "affected",
"version": "7.78.0"
},
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"status": "affected",
"version": "7.77.0"
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"status": "affected",
"version": "7.76.1"
},
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"status": "affected",
"version": "7.76.0"
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"status": "affected",
"version": "7.75.0"
},
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"status": "affected",
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"status": "affected",
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CVE-2026-3784 (GCVE-0-2026-3784)
Vulnerability from cvelistv5 – Published: 2026-03-11 10:09 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
wrong proxy connection reuse with credentials
Summary
curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a
server, even if the new request uses different credentials for the HTTP proxy.
The proper behavior is to create or use a separate connection.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:48 UTC
CWE
- CWE-305 - Authentication Bypass by Primary Weakness
Assigner
References
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.7.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.19.0 (semver) |
|
| curl | curl |
Affected:
a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 , < 5f13a7645e565c5c1a06f3ef86e97afb856fb364
(git)
|
|
| curl | curl |
Affected:
8.18.0
Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0 Affected: 7.70.0 Affected: 7.69.1 Affected: 7.69.0 Affected: 7.68.0 Affected: 7.67.0 Affected: 7.66.0 Affected: 7.65.3 Affected: 7.65.2 Affected: 7.65.1 Affected: 7.65.0 Affected: 7.64.1 Affected: 7.64.0 Affected: 7.63.0 Affected: 7.62.0 Affected: 7.61.1 Affected: 7.61.0 Affected: 7.60.0 Affected: 7.59.0 Affected: 7.58.0 Affected: 7.57.0 Affected: 7.56.1 Affected: 7.56.0 Affected: 7.55.1 Affected: 7.55.0 Affected: 7.54.1 Affected: 7.54.0 Affected: 7.53.1 Affected: 7.53.0 Affected: 7.52.1 Affected: 7.52.0 Affected: 7.51.0 Affected: 7.50.3 Affected: 7.50.2 Affected: 7.50.1 Affected: 7.50.0 Affected: 7.49.1 Affected: 7.49.0 Affected: 7.48.0 Affected: 7.47.1 Affected: 7.47.0 Affected: 7.46.0 Affected: 7.45.0 Affected: 7.44.0 Affected: 7.43.0 Affected: 7.42.1 Affected: 7.42.0 Affected: 7.41.0 Affected: 7.40.0 Affected: 7.39.0 Affected: 7.38.0 Affected: 7.37.1 Affected: 7.37.0 Affected: 7.36.0 Affected: 7.35.0 Affected: 7.34.0 Affected: 7.33.0 Affected: 7.32.0 Affected: 7.31.0 Affected: 7.30.0 Affected: 7.29.0 Affected: 7.28.1 Affected: 7.28.0 Affected: 7.27.0 Affected: 7.26.0 Affected: 7.25.0 Affected: 7.24.0 Affected: 7.23.1 Affected: 7.23.0 Affected: 7.22.0 Affected: 7.21.7 Affected: 7.21.6 Affected: 7.21.5 Affected: 7.21.4 Affected: 7.21.3 Affected: 7.21.2 Affected: 7.21.1 Affected: 7.21.0 Affected: 7.20.1 Affected: 7.20.0 Affected: 7.19.7 Affected: 7.19.6 Affected: 7.19.5 Affected: 7.19.4 Affected: 7.19.3 Affected: 7.19.2 Affected: 7.19.1 Affected: 7.19.0 Affected: 7.18.2 Affected: 7.18.1 Affected: 7.18.0 Affected: 7.17.1 Affected: 7.17.0 Affected: 7.16.4 Affected: 7.16.3 Affected: 7.16.2 Affected: 7.16.1 Affected: 7.16.0 Affected: 7.15.5 Affected: 7.15.4 Affected: 7.15.3 Affected: 7.15.2 Affected: 7.15.1 Affected: 7.15.0 Affected: 7.14.1 Affected: 7.14.0 Affected: 7.13.2 Affected: 7.13.1 Affected: 7.13.0 Affected: 7.12.3 Affected: 7.12.2 Affected: 7.12.1 Affected: 7.12.0 Affected: 7.11.2 Affected: 7.11.1 Affected: 7.11.0 Affected: 7.10.8 Affected: 7.10.7 Affected: 7.10.6 Affected: 7.10.5 Affected: 7.10.4 Affected: 7.10.3 Affected: 7.10.2 Affected: 7.10.1 Affected: 7.10 Affected: 7.9.8 Affected: 7.9.7 Affected: 7.9.6 Affected: 7.9.5 Affected: 7.9.4 Affected: 7.9.3 Affected: 7.9.2 Affected: 7.9.1 Affected: 7.9 Affected: 7.8.1 Affected: 7.8 Affected: 7.7.3 Affected: 7.7.2 Affected: 7.7.1 Affected: 7.7 |
|
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V4.0
(custom)
|
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"type": "finder"
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{
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}
],
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"id": "CWE-305"
},
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"affects": "both",
"issue": "https://hackerone.com/reports/3584903",
"last_affected": "8.18.0",
"package": "curl",
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"www": "https://curl.se/docs/CVE-2026-3784.html"
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"details": "curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a\nserver, even if the new request uses different credentials for the HTTP proxy.\nThe proper behavior is to create or use a separate connection.",
"id": "CURL-CVE-2026-3784",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-03-11T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "wrong proxy connection reuse with credentials"
}
}
},
"cveMetadata": {
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"assignerShortName": "curl",
"cveId": "CVE-2026-3784",
"datePublished": "2026-03-11T10:09:21.418Z",
"dateReserved": "2026-03-08T05:09:52.279Z",
"dateUpdated": "2026-09-15T06:02:54.443Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-3805 (GCVE-0-2026-3805)
Vulnerability from cvelistv5 – Published: 2026-03-11 10:09 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
use after free in SMB connection reuse
Summary
When doing a second SMB request to the same host again, curl would wrongly use
a data pointer pointing into already freed memory.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:45 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
8.13.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.19.0 (semver) |
|
| curl | curl |
Affected:
f4831daa9b2a97e8a2921d6b62cc4dfdd0d8646e , < e090be9f73a7a71459ef678c7cc4b1f75e3ea883
(git)
|
|
| curl | curl |
Affected:
8.18.0
Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 |
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-03-11T10:16:34.391Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/03/11/4"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
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"options": [
{
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},
{
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-11T15:45:10.217077Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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}
],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
}
],
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{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
"lessThan": "e090be9f73a7a71459ef678c7cc4b1f75e3ea883",
"status": "affected",
"version": "f4831daa9b2a97e8a2921d6b62cc4dfdd0d8646e",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Daniel Wade"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Stefan Eissing"
}
],
"descriptions": [
{
"lang": "en",
"value": "When doing a second SMB request to the same host again, curl would wrongly use\na data pointer pointing into already freed memory."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T06:02:55.871Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
},
"references": [
{
"url": "https://curl.se/docs/CVE-2026-3805.json"
},
{
"url": "https://curl.se/docs/CVE-2026-3805.html"
},
{
"url": "https://hackerone.com/reports/3591944"
}
],
"title": "use after free in SMB connection reuse",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
{
"introduced": "8.13.0"
},
{
"fixed": "8.14.2"
},
{
"introduced": "8.15.0"
},
{
"fixed": "8.16.1"
},
{
"introduced": "8.17.0"
},
{
"fixed": "8.19.0"
}
],
"type": "SEMVER"
},
{
"events": [
{
"introduced": "f4831daa9b2a97e8a2921d6b62cc4dfdd0d8646e"
},
{
"fixed": "e090be9f73a7a71459ef678c7cc4b1f75e3ea883"
}
],
"repo": "https://github.com/curl/curl.git",
"type": "GIT"
}
],
"versions": [
"8.18.0",
"8.17.0",
"8.16.0",
"8.15.0",
"8.14.1",
"8.14.0",
"8.13.0"
]
}
],
"aliases": [
"CVE-2026-3805"
],
"credits": [
{
"name": "Daniel Wade",
"type": "finder"
},
{
"name": "Stefan Eissing",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Use After Free",
"id": "CWE-416"
},
"URL": "https://curl.se/docs/CVE-2026-3805.json",
"affects": "both",
"issue": "https://hackerone.com/reports/3591944",
"last_affected": "8.18.0",
"package": "curl",
"severity": "Medium",
"www": "https://curl.se/docs/CVE-2026-3805.html"
},
"details": "When doing a second SMB request to the same host again, curl would wrongly use\na data pointer pointing into already freed memory.",
"id": "CURL-CVE-2026-3805",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-03-11T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "use after free in SMB connection reuse"
}
}
},
"cveMetadata": {
"assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"assignerShortName": "curl",
"cveId": "CVE-2026-3805",
"datePublished": "2026-03-11T10:09:37.729Z",
"dateReserved": "2026-03-08T16:07:39.817Z",
"dateUpdated": "2026-09-15T06:02:55.871Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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