CVE-2025-14819: Improper Certificate Validation

When doing TLS related transfers with reused easy or multi handles and altering the CURLSSLOPTNOPARTIALCHAIN option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcur...

CVE-2025-15079: Improper Validation of Certificate with Host Mismatch

When doing SSH-based transfers using either SCP or SFTP, and setting the knownhosts file, libcurl could still mistakenly accept connecting to hosts not present in the specified file if they were added as recognized in the libssh global knownhosts file...

CVE-2025-13034: Improper Certificate Validation

When using CURLOPTPINNEDPUBLICKEY option with libcurl or --pinnedpubkey with the curl tool, curl should check the public key of the server certificate to verify the peer. This check was skipped in a certain condition that would then make curl allow the connection without performing the proper...

broken TLS options for threaded LDAPS

When doing multi-threaded LDAPS transfers LDAP over TLS with libcurl, changing TLS options in one thread would inadvertently change them globally and therefore possibly also affect other concurrently setup transfers. Disabling certificate verification for a specific transfer could unintentionally...

PT-2026-28864

Уязвимость библиотеки libcurl программного средства для взаимодействия с серверами cURL связана с неправильным подтверждением подлинности сертификата. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, оказать воздействие на конфиденциальность защищаемой информации...

Important: ecs-service-connect-agent

Issue Overview: There exists a denial of service through Data corruption in gRPC-C++ - gRPC-C++ servers with transmit zero copy enabled through the channel arg GRPCARGTCPTXZEROCOPYENABLED can experience data corruption issues. The data sent by the application may be corrupted before transmission...

Linux Distros Unpatched Vulnerability : CVE-2025-15079

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When doing SSH-based transfers using either SCP or SFTP, and setting the knownhosts file, libcurl could still mistakenly accept connecting to hosts not present ...

CVE-2025-15079

When doing SSH-based transfers using either SCP or SFTP, and setting the knownhosts file, libcurl could still mistakenly accept connecting to hosts not present in the specified file if they were added as recognized in the libssh global knownhosts file...

UBUNTU-CVE-2025-14819

When doing TLS related transfers with reused easy or multi handles and altering the CURLSSLOPTNOPARTIALCHAIN option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcur...

curl: State Isolation Failure in Multiplexed Connections (Shared Auth Context)

Vulnerability: State Isolation Failure in Multiplexed Connections Shared Auth Context Product: libcurl Affected Versions: v7.43.0 - Current v8.x - All versions supporting HTTP/2 Multiplexing Severity: CRITICAL CVSS: 9.1 1. Executive Summary A fundamental design flaw exists in libcurl's state...

Amazon Linux 2 : ecs-service-connect-agent, --advisory ALAS2ECS-2025-093 (ALASECS-2025-093)

The version of ecs-service-connect-agent installed on the remote host is prior to v1.34.4.2-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2ECS-2025-093 advisory. There exists a denial of service through Data corruption in gRPC-C++ - gRPC-C++ servers with...

Important: ecs-service-connect-agent

Issue Overview: There exists a denial of service through Data corruption in gRPC-C++ - gRPC-C++ servers with transmit zero copy enabled through the channel arg GRPCARGTCPTXZEROCOPYENABLED can experience data corruption issues. The data sent by the application may be corrupted before transmission...

curl: PROTOCOL-LEVEL: Persistent UDP Amplification and Cache Poisoning via Alt-Svc Logic Flaw

Summary A structural logic flaw in the libcurl Alt-Svc header parser allows attack attributes specifically persist and max-age to "leak" from one service definition to another. We have successfully chained this logic bug with curl's HTTP/3 QUIC support to demonstrate a Persistent UDP Amplificatio...

curl: SMTP CRLF Injection & Protocol Desynchronization in libcurl

Executive Summary A critical security vulnerability has been identified in libcurl's SMTP protocol handler. The vulnerability allows for SMTP Command Smuggling and Protocol Desynchronization by injecting CRLF sequences into email address fields. This can be exploited to bypass security controls,...

curl: CVE-2025-15224: libssh key passphrase bypass without agent set

A vulnerability was discovered in the libcurl libssh backend where the CURLOPTSSHAUTHTYPES option did not properly implement the CURLSSHAUTHAGENT flag. As a result, if the CURLSSHAUTHPUBLICKEY option was set, the implementation would act as if CURLSSHAUTHAGENT was always defined, allowing...

curl: Cross‑Layer State Confusion in libcurl: Credential & Key‑Material Persistence Across Redirect / Connection Reuse Boundaries

Summary: This report describes a state‑level security invariant violation in libcurl where credential‑ or key‑related state may persist or be re‑applied across logical trust boundaries redirects, connection reuse, or scheme transitions without a formal invariant enforcing reset semantics. The iss...

curl: CRLF Injection / Protocol Smuggling in libcurl via CURLOPT_USERNAME (IMAP)

Summary: I have discovered a CRLF injection vulnerability in the IMAP protocol implementation of libcurl. The vulnerability exists because the imapatom function in lib/imap.c fails to properly sanitize or quote Carriage Return \r and Line Feed \n characters when processing the CURLOPTUSERNAME...

AlmaLinux 8 : curl (ALSA-2025:23383)

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2025:23383 advisory. curl: libcurl: Curl out of bounds read for cookie path CVE-2025-9086 Tenable has extracted the preceding description block directly from the AlmaLinux security...

curl security update

An update is available for curl. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The curl packages provide the libcurl library and the curl utility for downloadi...

RockyLinux 8 : curl (RLSA-2025:23383)

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2025:23383 advisory. curl: libcurl: Curl out of bounds read for cookie path CVE-2025-9086 Tenable has extracted the preceding description block directly from the RockyLinux security...