CVE-2026-87864
priority · track · 0EPSS 0.002 · 10 %ileDEFRUSEPSS · scored 2026-10-22
Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in the `IMAP APPEND {N}` literal while transmitting line-ending expanded data. The server reads only $N$ bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within the authenticated session.
cvss
Technical severity, 0–10. One row per scoring source.
No CVSS score recorded.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
advisories (4)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3904cURL: Mehrere SchwachstellenDeutsch2026-10-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand auszulösen.
- CERTFR-2026-AVI-1307Multiples vulnérabilités dans CurlFrançais2026-10-14vendor · certfrFR
- CERTFR-2026-AVI-1376Multiples vulnérabilités dans le noyau Linux d'UbuntuFrançais2026-10-23vendor · certfrFR
- CURL-CVE-2026-87864IMAP APPEND plus CRLF conversion command injection2026-10-14vendor · osvUS
Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in the `IMAP APPEND {N}` literal while transmitting line-ending expanded data. The server reads only $N$ bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within the authenticated session.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan