Every CVE Search/ Get API key

CVE-2025-61770

Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

7.5 HighFix available

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.93%Up 0.8 points since Oct 8, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.5

Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
CVE-2025-61770
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2025-32057 7.5

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
EUVD-2025-32057
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-p543-xpfm-54cp 7.5

Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

Summary

Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions.

Details

While searching for the first boundary, the parser appends incoming data into a shared buffer (@sbuf.concat(content)) and scans for the boundary pattern:

@sbuf.scan_until(@body_regex)

If the boundary is not yet found, the parser continues buffering data indefinitely. There is no trimming or size cap on the preamble, allowing attackers to send arbitrary amounts of data before the first boundary.

Impact

Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection.

Mitigation

  • Upgrade: Use a patched version of Rack that enforces a preamble size limit (e.g., 16 KiB) or discards preamble data entirely per RFC 2046 § 5.1.1.
  • Workarounds:
    • Limit total request body size at the proxy or web server level.
    • Monitor memory and set per-process limits to prevent OOM conditions.
Record
GHSA-p543-xpfm-54cp
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
NVD 7.5

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
CVE-2025-61770
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSV 7.5

Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
CVE-2025-61770
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVDEBIAN-CVE-2025-61770 7.5

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
DEBIAN-CVE-2025-61770
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 26 moreShow less
OSVGHSA-p543-xpfm-54cp 7.5

Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

Summary

Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions.

Details

While searching for the first boundary, the parser appends incoming data into a shared buffer (@sbuf.concat(content)) and scans for the boundary pattern:

@sbuf.scan_until(@body_regex)

If the boundary is not yet found, the parser continues buffering data indefinitely. There is no trimming or size cap on the preamble, allowing attackers to send arbitrary amounts of data before the first boundary.

Impact

Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection.

Mitigation

  • Upgrade: Use a patched version of Rack that enforces a preamble size limit (e.g., 16 KiB) or discards preamble data entirely per RFC 2046 § 5.1.1.
  • Workarounds:
    • Limit total request body size at the proxy or web server level.
    • Monitor memory and set per-process limits to prevent OOM conditions.
Record
GHSA-p543-xpfm-54cp
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVRHSA-2025:19512 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19512
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19513 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19513
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19647 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19647
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19719 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19719
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19733 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19733
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19734 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19734
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19736 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19736
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19800 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19800
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:19948 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:19948
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:20962 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:20962
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:21036 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:21036
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2025:21696 7.5

Red Hat Security Advisory: pcs security update

Record
RHSA-2025:21696
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRLSA-2025:19512 7.5

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)

  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)

  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)

  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)

  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2025:19512
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRLSA-2025:19719 7.5

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)

  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)

  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)

  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)

  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2025:19719
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRLSA-2025:20962 7.5

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)

  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)

  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)

  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)

  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2025:20962
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2025-61770 7.5

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

Record
UBUNTU-CVE-2025-61770
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVALSA-2025:19719 No score

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)
  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)
  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)
  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)
  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2025:19719
Updated
2026-11-02
OSVALSA-2025:20962 No score

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)
  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)
  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)
  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)
  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2025:20962
Updated
2026-11-02
OSVALSA-2025:21036 No score

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters (CVE-2025-59830)
  • rack: Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) (CVE-2025-61770)
  • rack: Rack's multipart parser buffers large non?file fields entirely in memory, enabling DoS (memory exhaustion) (CVE-2025-61771)
  • rack: Rack memory exhaustion denial of service (CVE-2025-61772)
  • rubygem-rack: Unbounded read in Rack::Request form parsing can lead to memory exhaustion (CVE-2025-61919)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2025:21036
Updated
2026-11-02
OSVCLSA-2026-1790243751 No score

pcs: Fix of 10 CVEs

  • CVE-2025-46727: unbounded query parsing in bundled rack; a body of repeated keys was parsed in full, exhausting memory. Capped by rack's new query bytesize and parameter-count limits, which pcsd turns into an HTTP 400
  • CVE-2025-59830: the same unbounded query parse reached through ';' separated query strings, which rack's parameter counter did not count
  • CVE-2025-61770: multipart parsing in bundled rack read the whole request body searching for a boundary that never arrived
  • CVE-2025-61771: multipart parsing in bundled rack retained an unbounded non-file field in memory
  • CVE-2025-61772: multipart mime part headers in bundled rack were read with no size limit
  • CVE-2025-61919: Rack::Request#POST read the entire request body before any limit applied, so a 64 MB body was fully buffered
  • CVE-2024-49761: quadratic regular expression in bundled rexml BaseParser#unnormalize; a long run of zeros in a hex character reference made the parser hang
  • CVE-2024-52804: quadratic cookie unquoting in bundled tornado _unquote_cookie, which rescanned the value from each escape
  • CVE-2025-47287: malformed multipart/form-data in bundled tornado logged a warning per bad part instead of rejecting the request, flooding the log
  • CVE-2026-31958: unbounded part count and part header size in bundled tornado multipart parsing
  • Stop forwarding client HTTP headers from the Tornado front end to the Ruby part of pcsd, which only ever needed the cookie and the content type
Record
CLSA-2026-1790243751
Updated
2026-11-02
OSVCLSA-2026-1790610331 No score

pcs: Fix of 10 CVEs

  • Update bundled rubygem rack to 2.2.20
  • CVE-2024-25126: fix ReDoS in Rack::MediaType content type parsing
  • CVE-2024-26141: fix response amplification from crafted Range headers
  • CVE-2024-26146: fix ReDoS in Accept and Forwarded header parsing
  • CVE-2025-46727: fix unbounded parameter count in Rack::QueryParser
  • CVE-2025-59830: fix params_limit bypass via semicolon-separated parameters
  • CVE-2025-61770: fix unbounded multipart preamble buffering
  • CVE-2025-61771: fix unbounded buffering of non-file multipart fields
  • CVE-2025-61772: fix unbounded multipart part header buffering
  • CVE-2025-61919: fix unbounded form body read in Rack::Request#POST
  • Handle Rack::QueryParser::QueryLimitError in pcsd, returning 400 instead of 500
  • CVE-2026-31958: cap multipart part count and part header size in bundled tornado
  • Disable multipart request parsing in pcsd, which does not use it
  • Drop i686 from ExclusiveArch: the bundled web UI needs npm at build time and npm has no i686 build, so the i686 buildroot cannot be created
Record
CLSA-2026-1790610331
Updated
2026-11-02
OSVCLSA-2026-1790610419 No score

pcs: Fix of 10 CVEs

  • Update bundled rubygem rack to 2.2.20
  • CVE-2024-25126: fix ReDoS in Rack::MediaType content type parsing
  • CVE-2024-26141: fix response amplification from crafted Range headers
  • CVE-2024-26146: fix ReDoS in Accept and Forwarded header parsing
  • CVE-2025-46727: fix unbounded parameter count in Rack::QueryParser
  • CVE-2025-59830: fix params_limit bypass via semicolon-separated parameters
  • CVE-2025-61770: fix unbounded multipart preamble buffering
  • CVE-2025-61771: fix unbounded buffering of non-file multipart fields
  • CVE-2025-61772: fix unbounded multipart part header buffering
  • CVE-2025-61919: fix unbounded form body read in Rack::Request#POST
  • Handle Rack::QueryParser::QueryLimitError in pcsd, returning 400 instead of 500
  • CVE-2026-31958: cap multipart part count and part header size in bundled tornado
  • Disable multipart request parsing in pcsd, which does not use it
  • Drop i686 from ExclusiveArch: the bundled web UI needs npm at build time and npm has no i686 build, so the i686 buildroot cannot be created
Record
CLSA-2026-1790610419
Updated
2026-11-02
OSVMGASA-2025-0334 No score

Updated ruby-rack packages fix security vulnerabilities

Unbounded-Parameter DoS in Rack::QueryParser. (CVE-2025-46727) ReDoS Vulnerability in Rack::Multipart handle_mime_head. (CVE-2025-49007) Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters. (CVE-2025-59830) Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion). (CVE-2025-61770) Rack's multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion). (CVE-2025-61771) Rack's multipart parser buffers unbounded per-part headers, enabling DoS (memory exhaustion). (CVE-2025-61772) Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing. (CVE-2025-61919) Rack has Possible Information Disclosure Vulnerability. (CVE-2025-61780)

Record
MGASA-2025-0334
Updated
2026-11-02
OSVopenSUSE-SU-2025:15621-1 No score

ruby3.4-rubygem-rack-2.2-2.2.19-1.1 on GA media

These are all security issues fixed in the ruby3.4-rubygem-rack-2.2-2.2.19-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15621-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:10286-1 No score

ruby4.0-rubygem-rack-2.2-2.2.22-1.1 on GA media

These are all security issues fixed in the ruby4.0-rubygem-rack-2.2-2.2.22-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10286-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rack
RubyGems
 before 2.2.19
2.2.19
rack
RubyGems
 3.1 up to 3.1.17
3.1.17
rack
RubyGems
 3.2 up to 3.2.2
3.2.2
pcs
AlmaLinux:8
From an advisory covering 5 CVEs
 before 0.10.18-2.el8_10.7.alma.1
0.10.18-2.el8_10.7.alma.1
pcs-snmp
AlmaLinux:8
From an advisory covering 5 CVEs
 before 0.10.18-2.el8_10.7.alma.1
0.10.18-2.el8_10.7.alma.1
pcs
AlmaLinux:9
From an advisory covering 5 CVEs
 before 0.11.10-1.el9_7.1
0.11.10-1.el9_7.1
pcs-snmp
AlmaLinux:9
From an advisory covering 5 CVEs
 before 0.11.10-1.el9_7.1
0.11.10-1.el9_7.1
cockpit-ha-cluster
AlmaLinux:10
From an advisory covering 5 CVEs
 before 0.12.1-1.el10_1.1
0.12.1-1.el10_1.1
pcs
TuxCare:CentOS-Stream:8
From an advisory covering 10 CVEs
 before 0.10.18-2.el8.tuxcare.els1
0.10.18-2.el8.tuxcare.els1
pcs-snmp
TuxCare:CentOS-Stream:8
From an advisory covering 10 CVEs
 before 0.10.18-2.el8.tuxcare.els1
0.10.18-2.el8.tuxcare.els1
Show 71 moreShow less
Affected packages
PackageAffectedFixed
pcs
TuxCare:CentOS:8.4
From an advisory covering 10 CVEs
 before 0.10.8-1.el8.tuxcare.els1
0.10.8-1.el8.tuxcare.els1
pcs-snmp
TuxCare:CentOS:8.4
From an advisory covering 10 CVEs
 before 0.10.8-1.el8.tuxcare.els1
0.10.8-1.el8.tuxcare.els1
pcs
TuxCare:CentOS:8.5
From an advisory covering 10 CVEs
 before 0.10.8-1.el8.tuxcare.els1
0.10.8-1.el8.tuxcare.els1
pcs-snmp
TuxCare:CentOS:8.5
From an advisory covering 10 CVEs
 before 0.10.8-1.el8.tuxcare.els1
0.10.8-1.el8.tuxcare.els1
ruby-rack
Debian:12
 before 2.2.20-0+deb12u1, plus listed versions
2.2.13-1~deb12u12.2.6.4-12.2.6.4-1+deb12u12.2.7-12.2.7-1.1
2.2.20-0+deb12u1
ruby-rack
Debian:13
 before 3.1.18-1~deb13u1, plus listed versions
3.1.16-0.1
3.1.18-1~deb13u1
ruby-rack
Debian:14
 before 3.1.18-1, plus listed versions
3.1.16-0.13.1.18-1~deb13u1
3.1.18-1
ruby-rack
Debian:11
From an advisory covering 8 CVEs
 before 2.1.4-3+deb11u4, plus listed versions
2.1.4-32.1.4-3+deb11u12.1.4-3+deb11u22.1.4-3+deb11u3
2.1.4-3+deb11u4
ruby-rack
Debian:12
From an advisory covering 5 CVEs
 before 2.2.20-0+deb12u1, plus listed versions
2.2.13-1~deb12u12.2.6.4-12.2.6.4-1+deb12u12.2.7-12.2.7-1.1
2.2.20-0+deb12u1
ruby-rack
Debian:13
From an advisory covering 5 CVEs
 before 3.1.18-1~deb13u1, plus listed versions
3.1.16-0.1
3.1.18-1~deb13u1
rack
RubyGems
 before 2.2.19, plus listed versions
0.1.00.2.00.3.00.4.00.9.0
Show 45 moreShow less
0.9.11.0.01.0.11.1.01.1.11.1.1.pre1.1.21.1.31.1.41.1.51.1.61.2.01.2.11.2.21.2.31.2.41.2.51.2.61.2.71.2.81.3.01.3.0.beta1.3.0.beta21.3.11.3.101.3.21.3.31.3.41.3.51.3.61.3.71.3.81.3.91.4.01.4.11.4.21.4.31.4.41.4.51.4.61.4.71.5.01.5.0.beta.11.5.0.beta.21.5.1
2.2.19
rack
RubyGems
 3.1 up to 3.1.17, plus listed versions
3.1.03.1.13.1.103.1.113.1.12
Show 12 moreShow less
3.1.133.1.143.1.153.1.163.1.23.1.33.1.43.1.53.1.63.1.73.1.83.1.9
3.1.17
rack
RubyGems
 3.2 up to 3.2.2, plus listed versions
3.2.03.2.1
3.2.2
ruby-rack
Mageia:9
From an advisory covering 8 CVEs
 before 2.2.21-1.mga9
2.2.21-1.mga9
pcs
Red Hat:enterprise_linux:9::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.9-2.el9_6.2
0:0.11.9-2.el9_6.2
pcs-snmp
Red Hat:enterprise_linux:9::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.9-2.el9_6.2
0:0.11.9-2.el9_6.2
pcs
Red Hat:enterprise_linux:9::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.9-2.el9_6.2
0:0.11.9-2.el9_6.2
pcs-snmp
Red Hat:enterprise_linux:9::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.9-2.el9_6.2
0:0.11.9-2.el9_6.2
cockpit-ha-cluster
Red Hat:enterprise_linux:10.0
From an advisory covering 5 CVEs
 before 0:0.12.0-3.el10_0.3
0:0.12.0-3.el10_0.3
pcs
Red Hat:enterprise_linux:10.0
From an advisory covering 5 CVEs
 before 0:0.12.0-3.el10_0.3
0:0.12.0-3.el10_0.3
pcs-snmp
Red Hat:enterprise_linux:10.0
From an advisory covering 5 CVEs
 before 0:0.12.0-3.el10_0.3
0:0.12.0-3.el10_0.3
pcs
Red Hat:rhel_e4s:8.8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.15-4.el8_8.9
0:0.10.15-4.el8_8.9
pcs-snmp
Red Hat:rhel_e4s:8.8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.15-4.el8_8.9
0:0.10.15-4.el8_8.9
pcs
Red Hat:rhel_tus:8.8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.15-4.el8_8.9
0:0.10.15-4.el8_8.9
pcs-snmp
Red Hat:rhel_tus:8.8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.15-4.el8_8.9
0:0.10.15-4.el8_8.9
pcs
Red Hat:enterprise_linux:8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.18-2.el8_10.7
0:0.10.18-2.el8_10.7
pcs-snmp
Red Hat:enterprise_linux:8::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.18-2.el8_10.7
0:0.10.18-2.el8_10.7
pcs
Red Hat:enterprise_linux:8::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.10.18-2.el8_10.7
0:0.10.18-2.el8_10.7
pcs-snmp
Red Hat:enterprise_linux:8::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.10.18-2.el8_10.7
0:0.10.18-2.el8_10.7
pcs
Red Hat:rhel_e4s:9.2::highavailability
From an advisory covering 4 CVEs
 before 0:0.11.4-7.el9_2.6
0:0.11.4-7.el9_2.6
pcs-snmp
Red Hat:rhel_e4s:9.2::highavailability
From an advisory covering 4 CVEs
 before 0:0.11.4-7.el9_2.6
0:0.11.4-7.el9_2.6
pcs
Red Hat:rhel_e4s:9.2::resilientstorage
From an advisory covering 4 CVEs
 before 0:0.11.4-7.el9_2.6
0:0.11.4-7.el9_2.6
pcs-snmp
Red Hat:rhel_e4s:9.2::resilientstorage
From an advisory covering 4 CVEs
 before 0:0.11.4-7.el9_2.6
0:0.11.4-7.el9_2.6
pcs
Red Hat:rhel_e4s:8.6::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.12-6.el8_6.10
0:0.10.12-6.el8_6.10
pcs-snmp
Red Hat:rhel_e4s:8.6::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.12-6.el8_6.10
0:0.10.12-6.el8_6.10
pcs
Red Hat:rhel_tus:8.6::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.12-6.el8_6.10
0:0.10.12-6.el8_6.10
pcs-snmp
Red Hat:rhel_tus:8.6::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.12-6.el8_6.10
0:0.10.12-6.el8_6.10
pcs
Red Hat:rhel_eus:9.4::highavailability
From an advisory covering 4 CVEs
 before 0:0.11.7-2.el9_4.5
0:0.11.7-2.el9_4.5
pcs-snmp
Red Hat:rhel_eus:9.4::highavailability
From an advisory covering 4 CVEs
 before 0:0.11.7-2.el9_4.5
0:0.11.7-2.el9_4.5
pcs
Red Hat:rhel_eus:9.4::resilientstorage
From an advisory covering 4 CVEs
 before 0:0.11.7-2.el9_4.5
0:0.11.7-2.el9_4.5
pcs-snmp
Red Hat:rhel_eus:9.4::resilientstorage
From an advisory covering 4 CVEs
 before 0:0.11.7-2.el9_4.5
0:0.11.7-2.el9_4.5
pcs
Red Hat:rhel_e4s:9.0::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.1-10.el9_0.9
0:0.11.1-10.el9_0.9
pcs-snmp
Red Hat:rhel_e4s:9.0::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.1-10.el9_0.9
0:0.11.1-10.el9_0.9
pcs
Red Hat:rhel_e4s:9.0::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.1-10.el9_0.9
0:0.11.1-10.el9_0.9
pcs-snmp
Red Hat:rhel_e4s:9.0::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.1-10.el9_0.9
0:0.11.1-10.el9_0.9
pcs
Red Hat:rhel_aus:8.4::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.8-1.el8_4.8
0:0.10.8-1.el8_4.8
pcs-snmp
Red Hat:rhel_aus:8.4::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.8-1.el8_4.8
0:0.10.8-1.el8_4.8
pcs
Red Hat:rhel_eus_long_life:8.4::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.8-1.el8_4.8
0:0.10.8-1.el8_4.8
pcs-snmp
Red Hat:rhel_eus_long_life:8.4::highavailability
From an advisory covering 5 CVEs
 before 0:0.10.8-1.el8_4.8
0:0.10.8-1.el8_4.8
pcs
Red Hat:enterprise_linux:9::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.10-1.el9_7.1
0:0.11.10-1.el9_7.1
pcs-snmp
Red Hat:enterprise_linux:9::highavailability
From an advisory covering 5 CVEs
 before 0:0.11.10-1.el9_7.1
0:0.11.10-1.el9_7.1
pcs
Red Hat:enterprise_linux:9::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.10-1.el9_7.1
0:0.11.10-1.el9_7.1
pcs-snmp
Red Hat:enterprise_linux:9::resilientstorage
From an advisory covering 5 CVEs
 before 0:0.11.10-1.el9_7.1
0:0.11.10-1.el9_7.1
cockpit-ha-cluster
Red Hat:enterprise_linux:10.1
From an advisory covering 5 CVEs
 before 0:0.12.1-1.el10_1.1
0:0.12.1-1.el10_1.1
pcs
Red Hat:enterprise_linux:10.1
From an advisory covering 5 CVEs
 before 0:0.12.1-1.el10_1.1
0:0.12.1-1.el10_1.1
pcs-snmp
Red Hat:enterprise_linux:10.1
From an advisory covering 5 CVEs
 before 0:0.12.1-1.el10_1.1
0:0.12.1-1.el10_1.1
pcs
Red Hat:enterprise_linux:7::server
From an advisory covering 3 CVEs
 before 0:0.9.169-3.el7_9.5
0:0.9.169-3.el7_9.5
pcs-debuginfo
Red Hat:enterprise_linux:7::server
From an advisory covering 3 CVEs
 before 0:0.9.169-3.el7_9.5
0:0.9.169-3.el7_9.5
pcs-snmp
Red Hat:enterprise_linux:7::server
From an advisory covering 3 CVEs
 before 0:0.9.169-3.el7_9.5
0:0.9.169-3.el7_9.5
pcs
Rocky Linux:9
From an advisory covering 5 CVEs
 before 0:0.11.9-2.el9_6.2
0:0.11.9-2.el9_6.2
pcs
Rocky Linux:8
From an advisory covering 5 CVEs
 before 0:0.10.18-2.el8_10.7
0:0.10.18-2.el8_10.7
pcs
Rocky Linux:9
From an advisory covering 5 CVEs
 before 0:0.11.10-1.el9_7.1
0:0.11.10-1.el9_7.1
ruby-rack
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.5.2-11.5.2-1ubuntu0.1~esm11.5.2-3+deb8u3ubuntu1~esm21.5.2-3+deb8u3ubuntu1~esm31.5.2-3+deb8u3ubuntu1~esm4
Show 6 moreShow less
1.5.2-3+deb8u3ubuntu1~esm61.5.2-3+deb8u3ubuntu1~esm71.5.2-3+deb8u3ubuntu1~esm81.5.2-3+deb8u3ubuntu1~esm91.5.2-3+deb8u3ubuntu1~esm101.5.2-3+deb8u3ubuntu1~esm11
 None known
ruby-rack
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.5.2-41.6.4-21.6.4-31.6.4-3ubuntu0.11.6.4-3ubuntu0.2
Show 9 moreShow less
1.6.4-3ubuntu0.2+esm11.6.4-3ubuntu0.2+esm21.6.4-3ubuntu0.2+esm41.6.4-3ubuntu0.2+esm51.6.4-3ubuntu0.2+esm61.6.4-3ubuntu0.2+esm71.6.4-3ubuntu0.2+esm81.6.4-3ubuntu0.2+esm91.6.4-3ubuntu0.2+esm10
 None known
ruby-rack
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.6.4-41.6.4-4ubuntu0.11.6.4-4ubuntu0.21.6.4-4ubuntu0.2+esm11.6.4-4ubuntu0.2+esm2
Show 7 moreShow less
1.6.4-4ubuntu0.2+esm41.6.4-4ubuntu0.2+esm51.6.4-4ubuntu0.2+esm61.6.4-4ubuntu0.2+esm71.6.4-4ubuntu0.2+esm81.6.4-4ubuntu0.2+esm91.6.4-4ubuntu0.2+esm10
 None known
ruby-rack
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
2.0.6-32.0.7-22.0.7-2ubuntu0.12.0.7-2ubuntu0.1+esm12.0.7-2ubuntu0.1+esm2
Show 8 moreShow less
2.0.7-2ubuntu0.1+esm32.0.7-2ubuntu0.1+esm42.0.7-2ubuntu0.1+esm52.0.7-2ubuntu0.1+esm62.0.7-2ubuntu0.1+esm72.0.7-2ubuntu0.1+esm82.0.7-2ubuntu0.1+esm92.0.7-2ubuntu0.1+esm10
 None known
ruby-rack
Ubuntu:22.04:LTS
 before 2.1.4-5ubuntu1.2, plus listed versions
2.1.4-32.1.4-42.1.4-52.1.4-5ubuntu12.1.4-5ubuntu1.1
2.1.4-5ubuntu1.2
ruby-rack
Ubuntu:24.04:LTS
 before 2.2.7-1ubuntu0.5, plus listed versions
2.2.4-32.2.7-12.2.7-1ubuntu0.12.2.7-1ubuntu0.22.2.7-1ubuntu0.32.2.7-1ubuntu0.4
2.2.7-1ubuntu0.5
ruby-rack
Ubuntu:25.10
 before 3.1.16-0.1ubuntu0.1, plus listed versions
2.2.7-1.13.1.16-0.1
3.1.16-0.1ubuntu0.1
rubygem-rack-2.2
openSUSE:Tumbleweed
From an advisory covering 3 CVEs
 before 2.2.19-1.1
2.2.19-1.1
rubygem-rack-2.2
openSUSE:Tumbleweed
From an advisory covering 27 CVEs
 before 2.2.22-1.1
2.2.22-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-61770 is a high vulnerability (CVSS 7.5) in Rack, published October 7, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.93%, the 60th percentile. Fixed in rack 2.2.19.

References

Show 110 moreShow less
This page doesn't list everything

Left out here: 69 versions. The JSON record has them.

Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open