curl 8.3

Status EOLSupport 2023-09 – 2023-10Latest 8.3.0Vulnerabilities 23← All curl versions
High 8.6
2024-03-27≤ 8.3.0

HTTP/2 push headers memory-leak

High 7.3
2025-01-01≤ 8.3.0

gzip integer overflow

Medium 6.5 Unfixed
2026-03-11≤ 8.3.0

wrong proxy connection reuse with credentials

Medium 6.5 Unfixed
2026-03-11≤ 8.3.0

bad reuse of HTTP Negotiate connection

Medium 6.5
2023-12-07≤ 8.3.0

curl: information disclosure by exploiting a mixed case flaw

Medium 6.5
2024-09-11≤ 8.3.0

OCSP stapling bypass with GnuTLS

Medium 6.3 Unfixed
2026-01-08≤ 8.3.0

broken TLS options for threaded LDAPS

Medium 5.9
2024-11-06≤ 8.3.0

HSTS subdomain overwrites parent cache entry

Medium 5.3 Unfixed
2026-04-29≤ 8.3.0

curl: curl: Proxy credential disclosure via redirects to unauthenticated proxies

Medium 5.3 Unfixed
2026-04-29≤ 8.3.0

curl: curl: Information disclosure due to incorrect TLS connection reuse

Medium 5.3 Unfixed
2026-03-11≤ 8.3.0

token leak with redirect and netrc

Medium 5.3 Unfixed
2026-01-08≤ 8.3.0

libssh global known_hosts override

Medium 5.3 Unfixed
2026-01-08≤ 8.3.0

OpenSSL partial chain store policy bypass

Medium 5.3 Unfixed
2026-01-08≤ 8.3.0

bearer token leak on cross-protocol redirect

Medium 5.3
2023-12-12≤ 8.3.0

curl: excessively long file name may lead to unknown HSTS status

Medium 4.3 Unfixed
2025-11-07≤ 8.3.0

missing SFTP host verification with wolfSSH

Low 3.5 Unfixed
2024-03-27≤ 8.3.0

Usage of disabled protocol

Low 3.4
2025-01-01≤ 8.3.0

netrc and default credential leak

Low 3.4
2024-12-11≤ 8.3.0

netrc and redirect credential leak

Low 3.1 Unfixed
2026-01-08≤ 8.3.0

libssh key passphrase bypass without agent set

N/A
2023-10-18≤ 8.3.0

N/A
2023-10-18≤ 8.3.0

N/A
2024-07-31≤ 8.3.0