CURL-CVE-2026-86414
- Source
- https://curl.se/docs/CVE-2026-86414.html
- Import Source
- https://curl.se/docs/CURL-CVE-2026-86414.json
- JSON Data
- https://api.osv.dev/v1/vulns/CURL-CVE-2026-86414
- Aliases
-
- CVE-2026-86414
- Published
- 2026-10-14T08:00:00Z
- Modified
- 2026-10-14T07:04:27Z
- Summary
- leaking host credentials to HTTP proxy
- Details
-
An HTTP proxy can trick libcurl into sending the origin's credentials (Basic password, or a Negotiate/Kerberos ticket) to the proxy itself, by answering the
CONNECTtunnel request with 401WWW-Authenticate:instead of the expected 407Proxy-Authenticate:. - Database specific
{ "CWE": { "desc": "Information Exposure Through Sent Data", "id": "CWE-201" }, "URL": "https://curl.se/docs/CVE-2026-86414.json", "affects": "both", "issue": "https://hackerone.com/reports/3993566", "last_affected": "8.22.0", "package": "curl", "severity": "Low", "www": "https://curl.se/docs/CVE-2026-86414.html" }- Credits
-
-
- Stanislav Fort (Aisle Research) - FINDER
-
- Stefan Eissing - REMEDIATION_DEVELOPER
-
Affected packages
Git / github.com/curl/curl.git
Affected ranges
- Type
- SEMVER
- Events
-
Introduced7.10.8Fixed8.23.0
- Type
- GIT
- Repo
- https://github.com/curl/curl.git
- Events
Affected versions
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
7.70.0
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
7.80.0
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
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
8.19.0
8.2.0
8.2.1
8.20.0
8.21.0
8.22.0
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
Other
before_ftp_statemachine
curl-7_10_8
curl-7_11_0
curl-7_11_1
curl-7_11_2
curl-7_12_0
curl-7_12_1
curl-7_12_2
curl-7_12_3
curl-7_13_0
curl-7_13_1
curl-7_13_2
curl-7_14_0
curl-7_14_1
curl-7_15_0
curl-7_15_1
curl-7_15_2
curl-7_15_3
curl-7_15_4
curl-7_15_5
curl-7_15_6-prepipeline
curl-7_16_0
curl-7_16_1
curl-7_16_2
curl-7_16_3
curl-7_16_4
curl-7_17_0
curl-7_17_0-preldapfix
curl-7_17_1
curl-7_18_0
curl-7_18_1
curl-7_18_2
curl-7_19_0
curl-7_19_1
curl-7_19_2
curl-7_19_3
curl-7_19_4
curl-7_19_5
curl-7_19_6
curl-7_19_7
curl-7_20_0
curl-7_20_1
curl-7_21_0
curl-7_21_1
curl-7_21_2
curl-7_21_3
curl-7_21_4
curl-7_21_5
curl-7_21_6
curl-7_21_7
curl-7_22_0
curl-7_23_0
curl-7_23_1
curl-7_24_0
curl-7_25_0
curl-7_26_0
curl-7_27_0
curl-7_28_0
curl-7_28_1
curl-7_29_0
curl-7_30_0
curl-7_31_0
curl-7_32_0
curl-7_33_0
curl-7_34_0
curl-7_35_0
curl-7_36_0
curl-7_37_0
curl-7_37_1
curl-7_38_0
curl-7_39_0
curl-7_40_0
curl-7_41_0
curl-7_42_0
curl-7_42_1
curl-7_43_0
curl-7_44_0
curl-7_45_0
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1
curl-7_55_0
curl-7_55_1
curl-7_56_0
curl-7_56_1
curl-7_57_0
curl-7_58_0
curl-7_59_0
curl-7_60_0
curl-7_61_0
curl-7_61_1
curl-7_62_0
curl-7_63_0
curl-7_64_0
curl-7_64_1
curl-7_65_0
curl-7_65_1
curl-7_65_2
curl-7_65_3
curl-7_66_0
curl-7_67_0
curl-7_68_0
curl-7_69_0
curl-7_69_1
curl-7_70_0
curl-7_71_0
curl-7_71_1
curl-7_72_0
curl-7_73_0
curl-7_74_0
curl-7_75_0
curl-7_76_0
curl-7_76_1
curl-7_77_0
curl-7_78_0
curl-7_79_0
curl-7_79_1
curl-7_80_0
curl-7_81_0
curl-7_82_0
curl-7_83_0
curl-7_83_1
curl-7_84_0
curl-7_85_0
curl-7_86_0
curl-7_87_0
curl-7_88_0
curl-7_88_1
curl-8_0_0
curl-8_0_1
curl-8_10_0
curl-8_10_1
curl-8_11_0
curl-8_11_1
curl-8_12_0
curl-8_12_1
curl-8_13_0
curl-8_14_0
curl-8_14_1
curl-8_15_0
curl-8_16_0
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_1_0
curl-8_1_1
curl-8_1_2
curl-8_20_0
curl-8_21_0
curl-8_22_0
curl-8_2_0
curl-8_2_1
curl-8_3_0
curl-8_4_0
curl-8_5_0
curl-8_6_0
curl-8_7_0
curl-8_7_1
curl-8_8_0
curl-8_9_0
curl-8_9_1
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3
rc-8_22_0-1
rc-8_22_0-2
rc-8_22_0-3
tiny-curl-7_72_0
tiny-curl-8_4_0
Database specific
source
"https://curl.se/docs/CURL-CVE-2026-86414.json"
vanir_signatures
[
{
"deprecated": false,
"digest": {
"function_hash": "257637578855016841248657910277963897518",
"length": 2081
},
"id": "CURL-CVE-2026-86414-7cce8e09",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/2956af6c7451029fb12c12f8166dff211f930d52",
"target": {
"file": "lib/cf-h1-proxy.c",
"function": "on_resp_header"
}
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"312160267926895481502484276438322824177",
"81200633714028850629145386112541521810",
"307129665221017983598257068056937627788",
"45164055031776551579620442550624133895",
"251900367188319030478777019251472565532",
"328601495639528051212027628404064657758",
"78392878748253805392452861055293441470"
],
"threshold": 0.9
},
"id": "CURL-CVE-2026-86414-a17b75a6",
"signature_type": "Line",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/2956af6c7451029fb12c12f8166dff211f930d52",
"target": {
"file": "lib/http_proxy.c"
}
},
{
"deprecated": false,
"digest": {
"function_hash": "269369611843920935469892527381525002327",
"length": 2363
},
"id": "CURL-CVE-2026-86414-aa4b6a29",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/2956af6c7451029fb12c12f8166dff211f930d52",
"target": {
"file": "lib/http_proxy.c",
"function": "Curl_http_proxy_inspect_tunnel_response"
}
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"329741433017589350415903422681748816887",
"253931529352840928795594931366939155610",
"89298656464641518414510640319763913616",
"93922929159459781266061183298742719755",
"305950444821924365518518222990579113729",
"296342007717287381101619484603129453125",
"199619961690389856653630266045228532095",
"84498895813186930599298433467646894197",
"93922929159459781266061183298742719755",
"305950444821924365518518222990579113729"
],
"threshold": 0.9
},
"id": "CURL-CVE-2026-86414-f5580e9e",
"signature_type": "Line",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/2956af6c7451029fb12c12f8166dff211f930d52",
"target": {
"file": "lib/cf-h1-proxy.c"
}
},
{
"deprecated": false,
"digest": {
"function_hash": "249128068805780593915379615774863356564",
"length": 2648
},
"id": "CURL-CVE-2026-86414-faabc579",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/2956af6c7451029fb12c12f8166dff211f930d52",
"target": {
"file": "lib/cf-h1-proxy.c",
"function": "on_resp_header_udp"
}
}
]
vanir_signatures_modified
"2026-10-14T07:04:27Z"