PT-2026-40993 · Julia · Curl Jll+1

Published 2026-05-04 · Updated 2026-05-04

OSV

When curl is used to retrieve and parse cookies from a HTTP(S) server, itaccepts cookies using control codes that when later are sent back to a HTTPserver might make the server return 400 responses. Effectively allowing a"sister site" to deny service to all siblings.

Related Identifiers

JLSEC-2026-397

Affected Products

Curl Jll

Libcurl Jll

References · 9

• https://osv.dev/vulnerability/JLSEC-2026-397 · Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/01/msg00028.html · Note
• https://support.apple.com/kb/HT213603 · Note
• https://security.netapp.com/advisory/ntap-20220930-0005 · Note
• http://seclists.org/fulldisclosure/2023/Jan/20 · Note
• https://support.apple.com/kb/HT213604 · Note
• https://hackerone.com/reports/1613943 · Note
• http://seclists.org/fulldisclosure/2023/Jan/21 · Note
• https://security.gentoo.org/glsa/202212-01 · Note