High
Security advisory
A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-22946
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:47 UTC · Revision 1
Source evidence
A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.
osv:CVE-2021-22946
Complete source record
{
"id": "47a218f559720a513bbd65b950a8ceb16eb78b22e489efefbab431084825ff6e",
"url": "https://osv.dev/vulnerability/CVE-2021-22946",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-22946",
"summary": "A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.",
"evidence": "osv:CVE-2021-22946",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-22946",
"aliases": [
"CURL-CVE-2021-22946",
"CVE-2021-22946"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
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"type": "GIT",
"events": [
{
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},
{
"fixed": "8e82f2a04a238c54ba91e553e9a8452e6d405965"
}
],
"database_specific": {
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{
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"range": [
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},
{
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}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"curl-7_77_0",
"curl-7_76_1",
"curl-7_76_0",
"curl-7_75_0",
"curl-7_74_0",
"curl-7_73_0",
"curl-7_72_0",
"curl-7_71_1",
"curl-7_71_0",
"curl-7_70_0",
"curl-7_69_1",
"curl-7_69_0",
"curl-7_68_0",
"curl-7_67_0",
"curl-7_66_0",
"curl-7_65_3",
"curl-7_65_2",
"curl-7_65_1",
"curl-7_65_0",
"curl-7_64_1",
"curl-7_64_0",
"curl-7_63_0",
"curl-7_62_0",
"curl-7_61_1",
"curl-7_61_0",
"curl-7_60_0",
"curl-7_59_0",
"curl-7_58_0",
"curl-7_57_0",
"curl-7_56_1",
"curl-7_56_0",
"curl-7_55_1",
"curl-7_55_0",
"curl-7_54_1",
"curl-7_54_0",
"curl-7_53_1",
"curl-7_53_0",
"curl-7_52_1",
"curl-7_52_0",
"curl-7_51_0",
"curl-7_50_3",
"curl-7_50_2",
"curl-7_50_1",
"curl-7_50_0",
"curl-7_49_1",
"curl-7_49_0",
"curl-7_48_0",
"curl-7_47_1",
"curl-7_47_0",
"curl-7_46_0",
"curl-7_45_0",
"curl-7_44_0",
"curl-7_43_0",
"curl-7_42_0",
"curl-7_41_0",
"curl-7_40_0",
"curl-7_39_0",
"curl-7_38_0",
"curl-7_37_1",
"curl-7_37_0",
"curl-7_36_0",
"curl-7_35_0",
"curl-7_34_0",
"curl-7_33_0",
"curl-7_32_0",
"curl-7_31_0",
"curl-7_30_0",
"curl-7_29_0",
"curl-7_28_1",
"curl-7_28_0",
"curl-7_27_0",
"curl-7_26_0",
"curl-7_25_0",
"curl-7_23_1",
"curl-7_23_0",
"curl-7_22_0",
"curl-7_21_7",
"curl-7_21_6",
"curl-7_21_5",
"curl-7_21_4",
"curl-7_21_3",
"curl-7_21_2",
"curl-7_21_1",
"curl-7_21_0",
"curl-7_20_1",
"curl-7_20_0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22946.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/mysql/mysql-server",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "89713bf41c33528c3e7682d219dc838915f5af9a"
},
{
"introduced": "270fd3411e3d671a73ed9725940a30080f59ce6d"
},
{
"last_affected": "beb865a960b9a8a16cf999c323e46c5b0c67f21f"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.7.0"
},
{
"last_affected": "5.7.35"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "8.0.0"
},
{
"last_affected": "8.0.26"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"mysql-8.0.26",
"mysql-5.7.35",
"mysql-5.7.32",
"mysql-5.7.31",
"mysql-5.1.4",
"mysql-4.0.4",
"mysql-4.0.2",
"mysql-3.23.36",
"mysql-3.23.33",
"mysql-3.23.32",
"mysql-3.23.31",
"mysql-3.23.30-gamma",
"mysql-3.23.28-gamma",
"mysql-3.23.22-beta"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22946.json"
}
}
],
"modified": "2026-10-24T10:30:58.566471042Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-146325.html",
"https://cert-portal.siemens.com/productcert/html/ssa-389290.html",
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html",
"https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/",
"https://security.gentoo.org/glsa/202212-01",
"https://security.netapp.com/advisory/ntap-20211029-0003/",
"https://security.netapp.com/advisory/ntap-20220121-0008/",
"https://support.apple.com/kb/HT213183",
"https://www.debian.org/security/2022/dsa-5197",
"https://www.oracle.com/security-alerts/cpujan2022.html",
"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
"https://hackerone.com/reports/1334111",
"https://www.oracle.com/security-alerts/cpuapr2022.html",
"https://www.oracle.com/security-alerts/cpujul2022.html",
"https://www.oracle.com/security-alerts/cpuoct2021.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"
],
"vendor_product": "apple:macos",
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{
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"fixed": "12.3"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
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],
"vendor_product": "siemens:sinec_infrastructure_network_services",
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}
],
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}
]
},
{
"cpes": [
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],
"vendor_product": "splunk:universal_forwarder",
"extracted_events": [
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{
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{
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{
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}
],
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{
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"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
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{
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{
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{
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{
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},
{
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{
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],
"vendor_product": "fedoraproject:fedora",
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{
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{
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},
{
"cpes": [
"cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:commerce_guided_search",
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},
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}
],
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}
]
},
{
"cpes": [
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"cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_cloud_native_core_binding_support_function",
"extracted_events": [
{
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{
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{
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}
]
},
{
"cpes": [
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],
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{
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},
{
"cpes": [
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],
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]
},
{
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"cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.0:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:*"
],
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{
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{
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{
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{
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{
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{
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{
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},
{
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],
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{
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{
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},
{
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}
],
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}
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},
{
"cpes": [
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],
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{
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{
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{
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}
],
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]
},
{
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],
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{
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{
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}
],
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]
},
{
"cpes": [
"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:*"
],
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"extracted_events": [
{
"range": [
{
"introduced": "8.57"
},
{
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},
{
"introduced": "8.58"
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{
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{
"introduced": "8.59"
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{
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}
],
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}
]
},
{
"cpes": [
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],
"vendor_product": "splunk:universal_forwarder",
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{
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{
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},
{
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}
],
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]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-22946",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 439114,
"published_at": "2021-09-29T20:15:08.187+00:00"
}