CURL-CVE-2026-3784
- Source
- https://curl.se/docs/CVE-2026-3784.html
- Import Source
- https://curl.se/docs/CURL-CVE-2026-3784.json
- JSON Data
- https://api.osv.dev/v1/vulns/CURL-CVE-2026-3784
- Aliases
- Published
- 2026-03-11T08:00:00Z
- Modified
- 2026-03-13T05:56:49.393824Z
- Summary
- wrong proxy connection reuse with credentials
- Details
-
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.
- Database specific
{ "package": "curl", "issue": "https://hackerone.com/reports/3584903", "severity": "Low", "URL": "https://curl.se/docs/CVE-2026-3784.json", "affects": "both", "CWE": { "desc": "Authentication Bypass by Primary Weakness", "id": "CWE-305" }, "www": "https://curl.se/docs/CVE-2026-3784.html", "last_affected": "8.18.0" }- References
-
- Credits
-
-
- Muhamad Arga Reksapati (HackerOne: nobcoder) - FINDER
-
- Stefan Eissing - REMEDIATION_DEVELOPER
-
Affected packages
Git / github.com/curl/curl.git
Affected ranges
- Type
- SEMVER
- Events
-
Introduced7.7Fixed8.19.0
- Type
- GIT
- Repo
- https://github.com/curl/curl.git
- Events
Affected versions
7.*
7.10
7.10.1
7.10.2
7.10.3
7.10.4
7.10.5
7.10.6
7.10.7
7.10.8
7.11.0
7.11.1
7.11.2
7.12.0
7.12.1
7.12.2
7.12.3
7.13.0
7.13.1
7.13.2
7.14.0
7.14.1
7.15.0
7.15.1
7.15.2
7.15.3
7.15.4
7.15.5
7.16.0
7.16.1
7.16.2
7.16.3
7.16.4
7.17.0
7.17.1
7.18.0
7.18.1
7.18.2
7.19.0
7.19.1
7.19.2
7.19.3
7.19.4
7.19.5
7.19.6
7.19.7
7.20.0
7.20.1
7.21.0
7.21.1
7.21.2
7.21.3
7.21.4
7.21.5
7.21.6
7.21.7
7.22.0
7.23.0
7.23.1
7.24.0
7.25.0
7.26.0
7.27.0
7.28.0
7.28.1
7.29.0
7.30.0
7.31.0
7.32.0
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.7
7.7.1
7.7.2
7.7.3
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0
7.79.0
7.79.1
7.8
7.8.1
7.80.0
7.81.0
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
7.9
7.9.1
7.9.2
7.9.3
7.9.4
7.9.5
7.9.6
7.9.7
7.9.8
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.10.0
8.10.1
8.11.0
8.11.1
8.12.0
8.12.1
8.13.0
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.2.0
8.2.1
8.3.0
8.4.0
8.5.0
8.6.0
8.7.0
8.7.1
8.8.0
8.9.0
8.9.1
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"deprecated": false,
"id": "CURL-CVE-2026-3784-1563ccc6",
"target": {
"file": "lib/url.c",
"function": "proxy_info_matches"
},
"digest": {
"length": 250.0,
"function_hash": "304424982618101118051780626607065937137"
},
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/5f13a7645e565c5c1a06f3ef86e97afb856fb364"
},
{
"signature_type": "Function",
"deprecated": false,
"id": "CURL-CVE-2026-3784-24fdd663",
"target": {
"file": "lib/url.c",
"function": "socks_proxy_info_matches"
},
"digest": {
"length": 251.0,
"function_hash": "156847319230870095583887509199151235125"
},
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/5f13a7645e565c5c1a06f3ef86e97afb856fb364"
},
{
"signature_type": "Line",
"deprecated": false,
"id": "CURL-CVE-2026-3784-db376948",
"target": {
"file": "lib/url.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"28198451978076953179959188918451268147",
"281673914764183415723044625038716534191",
"200855833354261436815608522668489466846",
"5387804322910666783572395908044232661",
"236020795518562151691835007362979410387",
"17450557644387912671244308544988815862",
"143048806250994210279637270903948951646",
"140460714839795236180824974953309975661",
"333720084210032823607267343226770582379",
"331697448246752651778648505556653532906",
"22128409967120680154956528188638186822",
"137746103134972144068270578958105877138",
"65788874135120305231986682270701016923",
"60737932765286278430331372663472782818",
"184914865177630377594351218661619057487",
"301989571442316518697531570240250833782",
"177716688628404441639553594179643257215",
"67479828686876523434398651942505625370",
"172521746541650491399053767548077956775",
"197718837176355740128997674513855282001",
"139478862402738275211722289962537500430"
]
},
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/5f13a7645e565c5c1a06f3ef86e97afb856fb364"
}
]
source
"https://curl.se/docs/CURL-CVE-2026-3784.json"