CVE-2026-87864

Description

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.

Why is this CVE low priority?

Upstream defined this as low severity

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Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	26.10 stonking	Fixed in 8.20.0-2ubuntu11.1
	26.04 LTS resolute	Fixed in 8.18.0-1ubuntu2.8
	24.04 LTS noble	Fixed in 8.5.0-2ubuntu10.16
	22.04 LTS jammy	Fixed in 7.81.0-1ubuntu1.30
	20.04 LTS focal	Fixed in 7.68.0-1ubuntu2.25+esm10
	18.04 LTS bionic	Fixed in 7.58.0-2ubuntu3.24+esm15
	16.04 LTS xenial	Fixed in 7.47.0-1ubuntu2.19+esm21
	14.04 LTS trusty	Fixed in 7.35.0-1ubuntu2.20+esm24

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
curl	Upstream: 3b547de

References

Related Ubuntu Security Notices (USN)

USN-8927-1
curl vulnerabilities
14 October 2026

USN-8932-1
curl vulnerabilities
14 October 2026

USN-8927-2
curl vulnerabilities
19 October 2026