Astra Linux – Vulnerability in curl

Curl versions 7.63.0 through 7.75.0 include a vulnerability that allows a malicious HTTPS proxy to intercept connections by mishandling TLS 1.3 session tickets. When using an HTTPS proxy and TLS 1.3, libcurl may misinterpret session tickets sent from the HTTPS proxy as those coming from the remot...

Astra Linux – Vulnerability in curl

There is an improper authentication vulnerability in curl versions 7.33.0 through and including 7.82.0. This vulnerability may allow for the reuse of OAUTH2-authenticated connections without ensuring that the connection was authentically verified with the same credentials used for this transfer...

Astra Linux – Vulnerability in curl

There is a vulnerability in curl version 7.87.0 where it is possible to exploit the memory reclamation mechanism. In this vulnerability, curl can be instructed to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can and often do deny such tunnel operations. When curl...

SUSE CVE-2025-5264

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11,...

curl: curl cross-origin HTTPS redirect reuses TLS client certificate for unintended second-origin mTLS authentication

Summary: When curl follows an HTTPS redirect to a different origin under normal -L / CURLOPTFOLLOWLOCATION behavior, it still presents the configured TLS client certificate to the redirected-to HTTPS server. This happens without --location-trusted / CURLOPTUNRESTRICTEDAUTH, even though curl alrea...

Fedora 43 : php (2026-c4d1ca4f16)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c4d1ca4f16 advisory. PHP version 8.4.21 07 May 2026 Core: Fixed bug GH-19983 GC assertion failure with fibers, generators and destructors. iliaal Fixed bug GH-21478...

curl: CVE-2026-9080: UAF after pause in socket callback

Hi all, We've found a heap-use-after-free in lib/multiev.c triggered by calling curleasypause from within a CURLMOPTSOCKETFUNCTION callback. ASAN-confirmed with the self-contained reproducer below. Affected versions: 8.13.0 – 8.20.0 current. The entry-action write line 280 has been vulnerable sin...

Advisory ROSA-SA-2026-3278

software: curl 8.7.1 OS: ROSA-CHROME unaffected versions = curl-8.7.1-7 affected versions curl-8.7.1-7 CVE-ID: CVE-2026-3784 BDU-ID: None CVE-Crit: MEDIUM CVE-DESC.: A vulnerability in curl involves incorrectly reusing an existing HTTP proxy connection CONNECT when making requests with different...

Moderate: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: curl: curl-8.20.0-2.hum1 aarch64, x8664 libcurl-8.20.0-2.hum1 aarch64, x8664 libcurl-devel-8.20.0-2.hum1 aarch64, x8664 libcurl-minimal-8.20.0-2.hum1 aarch64, x8664 curl-8.20.0-2.hum1.src src...

curl: Curl: Certificate validation bypass due to OCSP stapling flaw

A flaw was found in curl. When curl is configured to use the Certificate Status Request TLS Transport Layer Security extension, also known as OCSP Online Certificate Status Protocol stapling, it fails to properly detect issues with the OCSP response. This can lead curl to incorrectly validate a...

curl: curl --skip-existing has a TOCTOU race that lets a post-check symlink redirect the later download write

Summary: The curl CLI's --skip-existing option performs a separate existence check before the download body is written. In the verified path, curl first calls stat on the target pathname and decides "the file does not exist, so continue", but it does not keep an fd bound to that decision. The...

Photon OS 4.0: Curl PHSA-2026-4.0-1020

An update of the curl package has been released. %NASLMINLEVEL 80900 C Tenable, Inc. The descriptive text and package checks in this plugin were extracted from VMware Security Advisory PHSA-2026-4.0-1020. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

SUSE SLES15 Security Update : curl (SUSE-SU-2026:1940-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1940-1 advisory. Security issues fixed: - CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. - CVE-2026-5545: wrong reuse of HTTP...

Security Bulletin: curl vulnerability

Summary Prior versions of Classic Remote Capture may include this curl vulnerability. Vulnerability Details CVEID:CVE-2025-9086 DESCRIPTION: 1. A cookie is set using the secure keyword for https://target 2. curl is redirected to or otherwise made to speak with http://target same hostname, but...

Security update for curl

This update for curl fixes the following issues: Security issues fixed: CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. CVE-2026-6253: proxy credentials leak over redirect-to proxy bsc1262635. CVE-2026-6276:...

SUSE-SU-2026:1940-1 Security update for curl

This update for curl fixes the following issues: Security issues fixed: - CVE-2026-4873: connection reuse ignores TLS requirement bsc1262631. - CVE-2026-5545: wrong reuse of HTTP Negotiate connection bsc1262632. - CVE-2026-6253: proxy credentials leak over redirect-to proxy bsc1262635. -...

curl: CRLF Injection via Custom HTTP Headers

Summary: libcurl writes user-supplied custom headers directly into the HTTP request buffer without stripping \r\n characters. The raw input pointer origp in Curladdcustomheaders lib/http.c is serialized verbatim into the outgoing request using curlxdynaddfreq, "%s\r\n", origp instead of using the...

curl: Connection reuse ignores haproxyprotocol and HAPROXY_CLIENT_IP settings, allowing PROXY context to persist across transfers

Summary: libcurl's connection pool match logic does not include the CURLOPTHAPROXYPROTOCOL setting or the CURLOPTHAPROXYCLIENTIP value in its connection match key. Two transfers issued through the same Curleasy or via a shared connection cache CURLLOCKDATACONNECT therefore share one TCP connectio...

curl: SSL session-cache peer key omits signature_algorithms: strict-sigalg handle silently resumes a permissive sibling's session

CURLOPTSSLSIGNATUREALGORITHMS policy bypass: SSL session cache key omits sigalgs, allowing a strict-sigalg handle to resume a session negotiated under a permissive policy AI disclosure This report was prepared with the assistance of an AI coding assistant Claude. The behavioral diff pre/post patc...

CLSA-2026-1778890582 curl: Fix of CVE-2026-5545

CVE-2026-5545: wrong reuse of HTTP Negotiate connection; only allow an existing connection to be reused and "upgraded" to NTLM when neither NTLM nor Negotiate authentication is in flight on it...