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CVE-2026-97229

Integer Overflow or Wraparound in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server via a specially crafted regular expression in a CI/CD configuration, due to insufficient regular expression validation.

CVSS 3.1 · 10 Critical EPSS 69.3% KEV · Listed
Vendors
Gitlab Ruby-lang
Products
Gitlab Ruby
CVE-2026-33210

Ruby JSON has a format string injection vulnerability

Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Ruby Ruby-lang
Products
Json Json
CVE-2026-47241

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

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, 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 cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap
CVE-2026-47240

Net::IMAP: Command Injection via non-synchronizing literal in "raw" argument

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals. A server without support for non-synchronizing literals may interpret the "+}\r\n" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS 4.0 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap
CVE-2026-47242

Net::IMAP: Command Injection via ID command argument

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS 4.0 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap
CVE-2026-46727

Race Condition in Ruby 4 getaddrinfo Leading to Use‑After‑Free and Process Crash

An issue was discovered in Ruby 4 before 4.0.5. A race condition leading to a use-after-free in the pthread-based getaddrinfo timeout handler (rb_getaddrinfo in ext/socket/raddrinfo.c) allows a remote attacker who can delay DNS responses near the user-specified timeout to crash a Ruby process that calls Addrinfo.getaddrinfo(..., timeout:) or Socket.tcp(..., resolv_timeout:). Memory-corruption-based exploitation is theoretically possible. The attack could, for example, be carried out through a crafted authoritative DNS server or recursive resolver.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Ruby
CVE-2026-27820

zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption

zlib is a Ruby interface for the zlib compression/decompression library. Versions 3.0.0 and below, 3.1.0, 3.1.1, 3.2.0 and 3.2.1 contain a buffer overflow vulnerability in the Zlib::GzipReader. The zstream_buffer_ungets function prepends caller-provided bytes ahead of previously produced output but fails to guarantee the backing Ruby string has enough capacity before the memmove shifts the existing data. This can lead to memory corruption when the buffer length exceeds capacity. This issue has been fixed in versions 3.0.1, 3.1.2 and 3.2.3.

CVSS 4.0 · 1.7 Low EPSS < 1% KEV · Not listed
Vendors
Ruby Ruby-lang
Products
Zlib Zlib
CVE-2026-42245

net-imap: Quadratic complexity when reading response literals

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap Net\
CVE-2026-42246

net-imap vulnerable to STARTTLS stripping via invalid response timing

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.

CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap Net\
CVE-2026-42256

net-imap: Denial of service via high iteration count for `SCRAM-*` authentication

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap Net\
CVE-2026-42258

net-imap: Command Injection via unvalidated Symbol inputs

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS 4.0 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap Net\
CVE-2026-42257

net-imap: Command Injection via "raw" arguments to multiple commands

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS 4.0 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Ruby-lang
Products
Net::imap Net\
CVE-2008-3790

ruby: DoS vulnerability in the REXML module

The REXML module in Ruby 1.8.6 through 1.8.6-p287, 1.8.7 through 1.8.7-p72, and 1.9 allows context-dependent attackers to cause a denial of service (CPU consumption) via an XML document with recursively nested entities, aka an "XML entity explosion."

CVSS 2.0 · 5.0 Medium EPSS 15.2% KEV · Not listed
Vendors
Redhat Ruby-lang
Products
Enterprise Linux Ruby
CVE-2008-3657

ruby: missing "taintness" checks in dl module

The dl module in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 does not check "taintness" of inputs, which allows context-dependent attackers to bypass safe levels and execute dangerous functions by accessing a library using DL.dlopen.

CVSS 2.0 · 7.5 High EPSS 13.7% KEV · Not listed
Vendors
Redhat Ruby-lang
Products
Enterprise Linux Ruby
CVE-2008-2663

ruby: Integer overflows in rb_ary_store()

Multiple integer overflows in the rb_ary_store function in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, and 1.8.7 before 1.8.7-p22 allow context-dependent attackers to execute arbitrary code or cause a denial of service via unknown vectors, a different issue than CVE-2008-2662, CVE-2008-2664, and CVE-2008-2725. NOTE: as of 20080624, there has been inconsistent usage of multiple CVE identifiers related to Ruby. The CVE description should be regarded as authoritative, although it is likely to change.

CVSS 2.0 · 10.0 Critical EPSS 4.5% KEV · Not listed
Vendors
Canonical Debian Redhat and 1 more
Products
Ubuntu Linux Debian Linux Enterprise Linux and 1 more
CVE-2008-3656

ruby: WEBrick DoS vulnerability (CPU consumption)

Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.

CVSS 2.0 · 7.8 High EPSS 70.2% KEV · Not listed
Vendors
Redhat Ruby-lang
Products
Enterprise Linux Ruby
CVE-2008-3655

ruby: multiple insufficient safe mode restrictions

Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 does not properly restrict access to critical variables and methods at various safe levels, which allows context-dependent attackers to bypass intended access restrictions via (1) untrace_var, (2) $PROGRAM_NAME, and (3) syslog at safe level 4, and (4) insecure methods at safe levels 1 through 3.

CVSS 2.0 · 7.5 High EPSS 14.1% KEV · Not listed
Vendors
Redhat Ruby-lang
Products
Enterprise Linux Ruby
CVE-2008-2662

ruby: Integer overflows in rb_str_buf_append()

Multiple integer overflows in the rb_str_buf_append function in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2 allow context-dependent attackers to execute arbitrary code or cause a denial of service via unknown vectors that trigger memory corruption, a different issue than CVE-2008-2663, CVE-2008-2664, and CVE-2008-2725. NOTE: as of 20080624, there has been inconsistent usage of multiple CVE identifiers related to Ruby. This CVE description should be regarded as authoritative, although it is likely to change.

CVSS 2.0 · 10.0 Critical EPSS 4.3% KEV · Not listed
Vendors
Canonical Debian Redhat and 1 more
Products
Ubuntu Linux Debian Linux Enterprise Linux and 1 more
CVE-2008-1145

ruby: webrick directory traversal

Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, 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 option.

CVSS 2.0 · 5.0 Medium EPSS 27.1% KEV · Not listed
Vendors
Fedoraproject Redhat Ruby-lang
Products
Fedora Enterprise Linux Ruby and 1 more
CVE-2008-3443

ruby: Memory allocation failure in Ruby regex engine (remotely exploitable DoS)

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

CVSS 2.0 · 5.0 Medium EPSS 15.7% KEV · Not listed
Vendors
Redhat Ruby-lang
Products
Enterprise Linux Ruby