Low
control code in cookie denial of service
Type: advisorySources: OSV
When curl retrieves and parses cookies from an HTTP(S) server, it accepts cookies using control codes (byte values below 32). When cookies that contain such control codes are later sent back to an HTTP(S) server, it might make the server return a 400 response. Effectively allowing a "sister site" to deny service to siblings.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-35252
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:39 UTC · Revision 1
Source evidence
When curl retrieves and parses cookies from an HTTP(S) server, it accepts cookies using control codes (byte values below 32). When cookies that contain such control codes are later sent back to an HTTP(S) server, it might make the server return a 400 response. Effectively allowing a "sister site" to deny service to siblings.
osv:CURL-CVE-2022-35252
Complete source record
{
"id": "fef2b2ef9a67726e292e58d69926572ea32f41cfd79f6baec8da3769d827d938",
"url": "https://osv.dev/vulnerability/CURL-CVE-2022-35252",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "control code in cookie denial of service",
"summary": "When curl retrieves and parses cookies from an HTTP(S) server, it accepts cookies using control codes (byte values below 32). When cookies that contain such control codes are later sent back to an HTTP(S) server, it might make the server return a 400 response. Effectively allowing a \"sister site\" to deny service to siblings.",
"evidence": "osv:CURL-CVE-2022-35252",
"products": [],
"severity": "low",
"structured": {
"id": "CURL-CVE-2022-35252",
"aliases": [
"CURL-CVE-2022-35252",
"CVE-2022-35252"
],
"affected": [
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "4.9"
},
{
"fixed": "7.85.0"
}
]
},
{
"repo": "https://github.com/curl/curl.git",
"type": "GIT",
"events": [
{
"introduced": "ae1912cb0d494b48d514d937826c9fe83ec96c4d"
},
{
"fixed": "8dfc93e573ca740544a2d79ebb0ed786592c65c3"
}
]
}
],
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],
"database_specific": {
"source": "https://curl.se/docs/CURL-CVE-2022-35252.json",
"vanir_signatures": [
{
"id": "CURL-CVE-2022-35252-40001950",
"digest": {
"length": 10270,
"function_hash": "101577549221486820251477540902575052938"
},
"source": "https://github.com/curl/curl.git/commit/8dfc93e573ca740544a2d79ebb0ed786592c65c3",
"target": {
"file": "lib/cookie.c",
"function": "Curl_cookie_add"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CURL-CVE-2022-35252-da8e59b2",
"digest": {
"threshold": 0.9,
"line_hashes": [
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"323636526016408636056947651169731239107",
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]
},
"source": "https://github.com/curl/curl.git/commit/8dfc93e573ca740544a2d79ebb0ed786592c65c3",
"target": {
"file": "lib/cookie.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-25T01:05:34Z"
}
}
],
"modified": "2026-10-25T01:05:34.478654441Z",
"provider": "osv",
"references": [],
"provider_metadata": {
"CWE": {
"id": "CWE-1286",
"desc": "Improper Validation of Syntactic Correctness of Input"
},
"URL": "https://curl.se/docs/CVE-2022-35252.json",
"www": "https://curl.se/docs/CVE-2022-35252.html",
"award": {
"amount": "480",
"currency": "USD"
},
"issue": "https://hackerone.com/reports/1613943",
"affects": "both",
"package": "curl",
"severity": "Low",
"last_affected": "7.84.0"
}
},
"related_cves": [
{
"value": "CVE-2022-35252",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/database_specific/severity"
},
"source_id": "core-osv",
"document_id": 444404,
"published_at": "2022-08-31T08:00:00+00:00"
}