curl: Confirmed Security Misconfigurations on curl.se (BREACH, Missing Security Headers, ETag Info Disclosure)

Summary: During a security assessment of curl.se, multiple misconfigurations were identified that led to information disclosure or weakened the security posture of the website. Affected version: Website: https://curl.se Tested on: 09-09-2025 curl version: curl/8.8.0 x8664-pc-linux-gnu Steps To...

curl: CVE-2025-10148: predictable WebSocket mask

No AI was involved. Summary: The curl WebSocket implementation generates a fixed masking key at the beginning of a connection an re-uses it for every frame: Generation of masking key enc.mask in Curlwsaccept: https://github.com/curl/curl/blob/455afa1de5182b95a5dcc988f18cdff584b95239/lib/ws.cL1340...

MGASA-2025-0228 Updated thunderbird packages fix vulnerabilities

Use-after-free in FontFaceSet. CVE-2025-6424 The WebCompat WebExtension shipped exposed a persistent UUID. CVE-2025-6425 Incorrect parsing of URLs could have allowed embedding of youtube.com. CVE-2025-6429 Content-Disposition header ignored when a file is included in an embed or object tag...

OESA-2025-2099 thunderbird security update

Security Fixes: On 64-bit platforms, IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack, while Baseline-JIT read the entire 64 bits. This vulnerability affects Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13,...

Linux Distros Unpatched Vulnerability : CVE-2024-43432

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in moodle. The cURL wrapper in Moodle strips HTTPAUTH and USERPWD headers during emulated redirects, but retains other original request headers...

Linux Distros Unpatched Vulnerability : CVE-2024-38275

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The cURL wrapper in Moodle retained the original request headers when following redirects, so HTTP authorization header information could be unintentionally sen...

curl: libcurl: Host-Only Cookies Leak to Alternate IPv4 Forms

libcurl canonicalizes numeric IPv4 hostnames during URL parsing and redirect handling example: 127.000.000.001 to 127.0.0.1. When a host-only cookie no Domain= attribute is set, it is stored in the cookie jar with the host string 127.0.0.1. On redirect, even if the Location: contains an alias hos...

curl: Heap-buffer-overflow (Out-of-Bounds Read) in DoH hostname encoding

Summary: I found a heap-buffer-overflow in the dohreqencode function in lib/doh.c. The bug happens when curl processes a DNS-over-HTTPS request for a hostname that is an empty string. The code gets the string length as 0, then tries to access hostlen - 1, which becomes host-1. This is an...

Exploit for Inefficient Regular Expression Complexity in Jqueryvalidation Jquery_Validation

PoC exploit for CVE-2022-31147, a path traversal flaw in matthia...

Linux Distros Unpatched Vulnerability : CVE-2022-27776

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A insufficiently protected credentials vulnerability in fixed in curl 7.83.0 might leak authentication or cookie header data on HTTP redirects to the same host...

Linux Distros Unpatched Vulnerability : CVE-2022-27774

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An insufficiently protected credentials vulnerability exists in curl 4.9 to and include curl 7.82.0 are affected that could allow an attacker to extract...

curl: Incorrect Parsing of IPv6 Zone ID in curl

I'm Zehui Miao from NISL@THU. During recent research, our team identified a parsing inconsistency in the curl. 0x01 Affected components 1.1 Affected components • C Curl • Versions: tested in 8.4.0 • CLAIMS TO FOLLOW: RFC-3986 1.2 Attack scenario The threat model illustrated in Figure 1 explains t...

Mozilla Firefox ESR Copy as cURL Handler Code Execution

The vulnerability of the “Copy as cURL Handler” component in the Mozilla Firefox ESR browser and the Mozilla Thunderbird email client is related to access control deficiencies. Exploiting this vulnerability allows a malicious actor to execute arbitrary code remotely...

Linux Distros Unpatched Vulnerability : CVE-2022-22576

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An improper authentication vulnerability exists in curl 7.33.0 to and including 7.82.0 which might allow reuse OAUTH2-authenticated connections without properly...

curl: Missing Security Headers

Missing Security Headers Low Target: https://curl.se/ OWASP Mapping: A05 Misconfiguration / A02 Crypto Vulnerability ID: sec-headers-0f70ef5bcb Description A Missing Security Headers issue was discovered. This may allow an attacker to exploit the application. Proof of Concept Using cURL bash curl...

MAL-2025-47752 Malicious code in cffi-curl (PyPI)

--- -= Per source details. Do not edit below this line.=- Source: kam193 1bdc2d55f462ed9009995743e5bc50ed10641cffa24d5b16606e3a479fffae10 Malicious clone of a legitimate package "curl-cffi". When importing the module, it runs an obfuscated PowerShell command --- Category: MALICIOUS - The campaign...

Malicious code in cffi-curl (PyPI)

--- -= Per source details. Do not edit below this line.=- Source: kam193 1bdc2d55f462ed9009995743e5bc50ed10641cffa24d5b16606e3a479fffae10 Malicious clone of a legitimate package "curl-cffi". When importing the module, it runs an obfuscated PowerShell command --- Category: MALICIOUS - The campaign...

curl: curl leaks destination IP via glibc getaddrinfo() UDP connect, bypassing SOCKS5/Tor

Summary: When using curl with a SOCKS5 proxy e.g. Tor on 127.0.0.1:9050, glibc getaddrinfo performs direct UDP connect probes to the target’s IP:443. These syscalls bypass the proxy and expose the user’s route to the destination, breaking anonymity expectations. The IPs I got in my case:...

curl: Curl parse_connect_to_string Heap-Overread Leading to Denial of Service via CURLOPT_CONNECT_TO

Summary: A heap-buffer-overread occurs in Curl's parseconnecttostring function when using the CURLOPTCONNECTTO option with crafted input. This can lead to a segmentation fault and crash of the application, resulting in a denial-of-service. The issue is triggered by malformed host strings containi...

Linux Distros Unpatched Vulnerability : CVE-2024-8096

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it...