CURL-CVE-2026-4873
- Source
- https://curl.se/docs/CVE-2026-4873.html
- Import Source
- https://curl.se/docs/CURL-CVE-2026-4873.json
- JSON Data
- https://api.osv.dev/v1/vulns/CURL-CVE-2026-4873
- Aliases
-
- CVE-2026-4873
- Published
- 2026-04-29T08:00:00Z
- Modified
- 2026-04-29T14:05:08.176030Z
- Summary
- connection reuse ignores TLS requirement
- Details
-
A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.
- Database specific
{ "severity": "Low", "URL": "https://curl.se/docs/CVE-2026-4873.json", "www": "https://curl.se/docs/CVE-2026-4873.html", "CWE": { "id": "CWE-319", "desc": "Cleartext Transmission of Sensitive Information" }, "last_affected": "8.19.0", "affects": "both", "package": "curl", "issue": "https://hackerone.com/reports/3621851" }- References
-
- Credits
-
-
- Arkadi Vainbrand - FINDER
-
- Daniel Stenberg - REMEDIATION_DEVELOPER
-
Affected packages
Git / github.com/curl/curl.git
Affected ranges
- Type
- SEMVER
- Events
-
Introduced7.20.0Fixed8.20.0
- Type
- GIT
- Repo
- https://github.com/curl/curl.git
- Events
Affected versions
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
8.3.0
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
source
"https://curl.se/docs/CURL-CVE-2026-4873.json"
vanir_signatures_modified
"2026-04-29T14:05:08Z"
vanir_signatures
[
{
"signature_type": "Function",
"digest": {
"length": 399.0,
"function_hash": "169885633457962860362958220457320236532"
},
"id": "CURL-CVE-2026-4873-432df36b",
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c",
"function": "url_match_ssl_use"
}
},
{
"signature_type": "Line",
"digest": {
"line_hashes": [
"186702639195371621663220614719413669739",
"98146386134768362884346766368977077720",
"144008511706963310545008089099783743644",
"214623997824184722186061516736204732779",
"124575361568450278741812246576167336919",
"105135349804760838859480469610730392589",
"193100289411074928523858916880171338604",
"6936524333846488920218514747282650233",
"276618269211397366230394600852763568259",
"229942947754903715914943302740058426565",
"288248169414681199400959167724664616055"
],
"threshold": 0.9
},
"id": "CURL-CVE-2026-4873-731b3328",
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c"
}
},
{
"signature_type": "Function",
"digest": {
"length": 1203.0,
"function_hash": "141979231375931355570407370477556625049"
},
"id": "CURL-CVE-2026-4873-9a7ca877",
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c",
"function": "url_attach_existing"
}
}
]