High
cookie injection for other servers
Type: advisorySources: OSV
If cookie state is written into a cookie jar file that is later read back and used for subsequent requests, a malicious HTTP server can inject new cookies for arbitrary domains into said cookie jar. The issue pertains to the function that loads cookies into memory, which reads the specified file into a fixed-size buffer in a line-by-line manner using the `fgets()` function. If an invocation of `fgets()` cannot read the whole line into the destination buffer due to it being too small, it truncates the output. This way, a long cookie (name + value) sent by a malicious server would be stored in the file and subsequently that cookie could be read partially and crafted correctly, it could be treated as a different cookie for another server.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-8615
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:37 UTC · Revision 1
Source evidence
If cookie state is written into a cookie jar file that is later read back and used for subsequent requests, a malicious HTTP server can inject new cookies for arbitrary domains into said cookie jar. The issue pertains to the function that loads cookies into memory, which reads the specified file into a fixed-size buffer in a line-by-line manner using the `fgets()` function. If an invocation of `fgets()` cannot read the whole line into the destination buffer due to it being too small, it truncates the output. This way, a long cookie (name + value) sent by a malicious server would be stored in the file and subsequently that cookie could be read partially and crafted correctly, it could be treated as a different cookie for another server.
osv:CURL-CVE-2016-8615
Complete source record
{
"id": "e65fc08ab4d4202417d46d08af5062c5939f7b54ee50d628e02461795529495d",
"url": "https://osv.dev/vulnerability/CURL-CVE-2016-8615",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "cookie injection for other servers",
"summary": "If cookie state is written into a cookie jar file that is later read back and used for subsequent requests, a malicious HTTP server can inject new cookies for arbitrary domains into said cookie jar. The issue pertains to the function that loads cookies into memory, which reads the specified file into a fixed-size buffer in a line-by-line manner using the `fgets()` function. If an invocation of `fgets()` cannot read the whole line into the destination buffer due to it being too small, it truncates the output. This way, a long cookie (name + value) sent by a malicious server would be stored in the file and subsequently that cookie could be read partially and crafted correctly, it could be treated as a different cookie for another server.",
"evidence": "osv:CURL-CVE-2016-8615",
"products": [],
"severity": "high",
"structured": {
"id": "CURL-CVE-2016-8615",
"aliases": [
"CURL-CVE-2016-8615",
"CVE-2016-8615"
],
"affected": [
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "4.9"
},
{
"fixed": "7.51.0"
}
]
},
{
"repo": "https://github.com/curl/curl.git",
"type": "GIT",
"events": [
{
"introduced": "ae1912cb0d494b48d514d937826c9fe83ec96c4d"
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{
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}
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"database_specific": {
"source": "https://curl.se/docs/CURL-CVE-2016-8615.json",
"vanir_signatures": [
{
"id": "CURL-CVE-2016-8615-c0c59a57",
"digest": {
"threshold": 0.9,
"line_hashes": [
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},
"source": "https://github.com/curl/curl.git/commit/cff89bc088b7884098ea0c5378bbda3d49c437bc",
"target": {
"file": "lib/cookie.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-25T01:04:55Z"
}
}
],
"modified": "2026-10-25T01:04:55.215025186Z",
"provider": "osv",
"references": [],
"provider_metadata": {
"CWE": {
"id": "CWE-187",
"desc": "Partial Comparison"
},
"URL": "https://curl.se/docs/CVE-2016-8615.json",
"www": "https://curl.se/docs/CVE-2016-8615.html",
"affects": "both",
"package": "curl",
"severity": "High",
"last_affected": "7.50.3"
}
},
"related_cves": [
{
"value": "CVE-2016-8615",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/database_specific/severity"
},
"source_id": "core-osv",
"document_id": 444308,
"published_at": "2016-11-02T08:00:00+00:00"
}