lynx Gem for Ruby command/basic.rb Process Table Local Plaintext Password Disclosure

lynx Gem for Ruby contains a flaw in command/basic.rb that is due to the application exposing password information in plaintext in the process table. This may allow a local attacker to gain access to password information...

Fat Free CRM Gem for Ruby contains multiple cross-site request forgery (CSRF) vulnerabilities

Fat Free CRM contains a flaw as the application is missing the protectfromforgery statement, therefore HTTP requests to app/controllers/applicationcontroller.rb do not require multiple steps, explicit confirmation, or a unique token when performing certain sensitive actions. By tricking a user in...

MiniMagick Gem for Ruby URI Handling Arbitrary Command Injection

MiniMagick Gem for Ruby contains a flaw that is triggered during the handling of specially crafted input from an untrusted source passed via a URL that contains a ';' character. This may allow a context-dependent attacker to potentially execute arbitrary commands...

Spree app/models/spree/user.rb Mass Role Assignment Remote Privilege Escalation

Spree contains a flaw that leads to unauthorized privileges being gained. The issue is triggered as certain input related to mass role assignment in app/models/spree/user.rb is not properly verified before being used to update a user. This may allow a remote attacker to assign arbitrary roles and...

Security Bypass Vulnerability with Ruby

The Ruby language has a security mechanism security model that can restrict operations on untrusted objects. This security model is based on mechanisms called "object taint" and "safe level." A vulnerability has been confirmed that allows arbitrary script execution by bypassing the "safe level"...

Oj - Negative-Size memcpy in 'Oj::Parser' create_id Attribute Handling

Summary Oj::Parserparse in usual mode with createid enabled is vulnerable to heap corruption via a negative-size memcpy. When a JSON object key is exactly 65,535 bytes long, an integer truncation in formattr usual.c:63 converts the length to -1 before passing it to memcpy. This causes memcpy to...

Net::IMAP: Denial of Service via incomplete raw argument validation

Summary Several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will...

Net::IMAP: Command Injection via ID command argument

Summary Two Net::IMAP commands, id and enable, do not validate their arguments. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. Please note that passing untrusted inputs to these commands is usually inappropriate and expected to be uncommon. Details Whe...

around_render HTML-Safety Bypass

Summary ViewComponent::Basearoundrender can return HTML-unsafe strings that bypass the escaping behavior applied to normal call return values. This creates an XSS risk when downstream applications use aroundrender to wrap, replace, instrument, or conditionally return content that includes...

MCP Ruby SDK - Insufficient Session Binding Allows SSE Stream Hijacking via Session ID Replay

Summary The Ruby SDK's streamablehttptransport.rb implementation contains a session hijacking vulnerability. An attacker who obtains a valid session ID can completely hijack the victim's Server-Sent Events SSE stream and intercept all real-time data. Details Root Cause The StreamableHTTPTransport...

Rails Active Storage has a possible DoS vulnerability when in proxy mode via Range requests

Impact When serving files through Active Storage's Blobs::ProxyController, the controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header e.g. bytes=0- could cause the server to allocate memory proportional to the file size,...

bcrypt-ruby has an Integer Overflow that Causes Zero Key-Strengthening Iterations at Cost=31 on JRuby

Impact An integer overflow in the Java BCrypt implementation for JRuby can cause zero iterations in the strengthening loop. Impacted applications must be setting the cost to 31 to see this happen. The JRuby implementation of bcrypt-ruby BCrypt.java computes the key-strengthening round count as a...

Rack has a Directory Traversal via Rack:Directory

Summary Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../rootexample/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Details In directory.rb,...

Faraday affected by SSRF via protocol-relative URL host override in build_exclusive_url

Impact Faraday's buildexclusiveurl method in lib/faraday/connection.rb uses Ruby's URImerge to combine the connection's base URL with a user-supplied path. Per RFC 3986, protocol-relative URLs e.g. //evil.com/path are treated as network-path references that override the base URL's host/authority...

Decidim's private data exports can lead to data leaks

Impact Private data exports can lead to data leaks in cases where the UUID generation causes collisions for the generated UUIDs. The bug was introduced by 13571 and affects Decidim versions 0.30.0 or newer currently 2025-09-23. This issue was discovered by running the following spec several times...

Multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)

Summary Rack::Multipart::Parser stores non-file form fields parts without a filename entirely in memory as Ruby String objects. A single large text field in a multipart/form-data request hundreds of megabytes or more can consume equivalent process memory, potentially leading to out-of-memory OOM...

Rack has an unsafe default in Rack::QueryParser allows params_limit bypass via semicolon-separated parameters

Summary Rack::QueryParser in version 2.2.18 enforces its paramslimit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters than intended. Details The issue arises...

Google Sign-In for Rails allowed redirect to protocol-relative URI

Summary It is possible to redirect a user to another origin if the "proceedto" value in the session store is set to a protocol-relative URL. Details The googlesignin gem persists an optional URL for redirection after authentication. If this URL is set to a protocol-relative URL, it improperly...

Spree Commerce is vulnerable to RCE through Search API

Spreecommerce versions prior to 0.50.x contain a remote command execution vulnerability in the API's search functionality. Improper input sanitation allows attackers to inject arbitrary shell commands via the searchinstanceeval parameter, which is dynamically invoked using Ruby’s send method. Thi...

Possible ReDoS vulnerability in plain_text_for_blockquote_node in Action Text

There is a possible ReDoS vulnerability in the plaintextforblockquotenode helper in Action Text. This vulnerability has been assigned the CVE identifier CVE-2024-47888. Impact Carefully crafted text can cause the plaintextforblockquotenode helper to take an unexpected amount of time, possibly...

omniauth-saml vulnerable to Improper Verification of Cryptographic Signature

ruby-saml, the dependent SAML gem of omniauth-saml has a signature wrapping vulnerability in = v1.12.0 and v1.13.0 to v1.16.0 , see https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2 As a result, omniauth-saml created a new release by upgrading ruby-saml to the...

Cross-site Scripting (XSS) possible with maliciously formed HTML attribute names and values in Phlex

There is a potential cross-site scripting XSS vulnerability that can be exploited via maliciously crafted user data. This was due to improper case-sensitivity in the code that was meant to prevent these attacks. Impact If you render an tag with an href attribute set to a user-provided link, that...

Publify Improper Input Validation vulnerability

Improper Input Validation in GitHub repository publify/publify prior to 9.2.10...

keynote Cross-site Scripting vulnerability

A vulnerability was found in rf Keynote up to 0.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the file lib/keynote/rumble.rb. The manipulation of the argument value leads to cross site scripting. The attack may be launched remotely. Upgrading to...

OmniAuth's `lib/omniauth/failure_endpoint.rb` does not escape `message_key` value

lib/omniauth/failureendpoint.rb in OmniAuth before 1.9.2 and before 2.0 does not escape the messagekey value...

Use of Uninitialized Variable in trilogy

Impact When authenticating, a malicious server could return a specially crafted authentication packet, causing the client to read and return up to 12 bytes of data from an uninitialized variable in stack memory. Patches Users of the trilogy gem should upgrade to version 2.1.1 Workarounds This iss...

RubyGems Link Following vulnerability

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in installlocation function of package.rb that can result in...

User after free in mrb_vm_exec in mruby/mruby

User after free in mrbvmexec in GitHub repository mruby/mruby prior to 3.2...

Out-of-bounds Read in mruby/mruby

Out-of-bounds Read in GitHub repository mruby/mruby prior to 3.2...

NULL Pointer Dereference in mruby/mruby

NULL Pointer Dereference in Homebrew mruby prior to 3.2...

NULL Pointer Dereference in mruby/mruby

mruby is vulnerable to NULL Pointer Dereference...

Cross-Site Request Forgery (CSRF) in trestle-auth

Impact A vulnerability in trestle-auth versions 0.4.0 and 0.4.1 allows an attacker to create a form that will bypass Rails' built-in CSRF protection when submitted by a victim with a trestle-auth admin session. This potentially allows an attacker to alter protected data, including admin account...

Path traversal in Tempfile on Windows

There is an unintentional directory creation vulnerability in tmpdir library bundled with Ruby on Windows. And there is also an unintentional file creation vulnerability in tempfile library bundled with Ruby on Windows, because it uses tmpdir internally...

Missing TLS certificate verification in faye-websocket

The Faye::WebSocket::Client class uses the EM::Connectionstarttls1 method in EventMachine2 to implement the TLS handshake whenever a wss: URL is used for the connection. This method does not implement certificate verification by default, meaning that it does not check that the server presents a...

Cross-site scripting vulnerability via `<math>` or `<svg>` element in Sanitize

When HTML is sanitized using Sanitize's "relaxed" config or a custom config that allows certain elements, some content in a or element may not be sanitized correctly even if math and svg are not in the allowlist. You are likely to be vulnerable to this issue if you use Sanitize's relaxed config o...

secure_headers directive injection using semicolon

If user-supplied input was passed into append/overridecontentsecuritypolicydirectives, a semicolon could be injected leading to directive injection. This could be used to e.g. override a script-src directive. Duplicate directives are ignored and the first one wins. The directives in secureheaders...

Private Ruby OpenSSL RSA key generation is always "1"

The OpenSSL extension of Ruby Git trunk versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation...

rack-cors directory traversal via path

An issue was discovered in the rack-cors aka Rack CORS Middleware gem before 1.0.4 for Ruby. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format...

Prototype Pollution in Chartkick.js 3.1.x

A specially crafted response in data loaded via URL can cause prototype pollution in JavaScript...

Code execution backdoor in doge-coin

The doge-coin gem 1.0.2 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. Users of an affected version should consider downgrading to the last non-affected version of 1.0.1...

Code execution backdoor in datagrid

The datagrid gem 1.0.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party...

fat_free_crm gem XSS vulnerability via query parameter

FatFreeCRM version =0.15.0 =0.16.0 =0.17.0 =0.17.2, ==0.18.0 contains a Cross Site Scripting XSS vulnerability in commit 6d60bc8ed010c4eda05d6645c64849f415f68d65 that can result in Javascript execution. This attack appear to be exploitable via Content with Javascript payload will be executed on e...

Improper Input Validation in rails

Ruby on Rails 2.1 before 2.1.3 and 2.2.x before 2.2.2 does not verify tokens for requests with certain content types, which allows remote attackers to bypass cross-site request forgery CSRF protection for requests to applications that rely on this protection, as demonstrated using text/plain...

Safemode Gem for Ruby is vulnerable to bypassing safe mode limitations

Safemode, as used in Foreman, versions 1.3.2 and earlier are vulnerable to bypassing safe mode limitations via special Ruby syntax. This can lead to deletion of objects for which the user does not have delete permissions or possibly to privilege escalation...

Potential Denial of Service Vulnerability in Rack

Carefully crafted requests can cause a SystemStackError and potentially cause a denial of service attack. All users running an affected release should upgrade...

backup-agoddard Gem for Ruby /lib/backup/cli/utility.rb Process Table Local Plaintext Password Disclosure

backup-agoddard Gem for Ruby contains a flaw in /lib/backup/cli/utility.rb that is due to the application exposing password information in plaintext in the process table. This may allow a local attacker to gain access to password information...

CVE-2013-0162 rubygem-ruby_parser: incorrect temporary file usage

The diffpp function in lib/gauntletrubyparser.rb in the rubyparser gem 3.1.1 and earlier for Ruby allows local users to overwrite arbitrary files via a symlink attack on a temporary file with a predictable name in /tmp...

Dragonfly Gem for Ruby Crafted Request Parsing Remote Code Execution

Dragonfly Gem for Ruby contains a flaw that is triggered during the parsing of a specially crafted request. This may allow a remote attacker to execute arbitrary code. This gem has been renamed. Please use "dragonfly" from now on...

Directory traversal vulnerability in WEBrick

Directory traversal vulnerability in WEBrick when running on systems that support backslash path separators or case-insensitive file names, allows remote attackers to access arbitrary files via 1 "..%5c" encoded backslash sequences or 2 filenames that match patterns in the :NondisclosureName opti...

Fluentd is Vulnerable to Exposure of Sensitive Information via Monitor Agent API

Fluentd's Monitor Agent plugin inmonitoragent exposes internal metrics and plugin information via a REST API. It was discovered that the API response /api/plugins.json and related endpoints unintentionally includes internal instance variables of loaded plugins. If any plugins store sensitive...