Detections
Analytics
SCA: security update for rack (GHSA-p543-xpfm-54cp)
high Tenable Cloud Security Plugin ID 435526
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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. (CVE-2025-61770)
See Also
Plugin Details
Severity: High
ID: 435526
Version: Revision 1.6
Type: Local
Family: SCA Checks
Published: 10/7/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.88
Vendor
Vendor Severity: High
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2025-61770
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 10/7/2025
Vulnerability Publication Date: 10/7/2025
Reference Information
CVE: CVE-2025-61770
IAVB: 2025-B-0167-S
cwe: CWE-400