CVE-2026-32239 impacts Cap'n Proto versions prior to 1.4.0, stemming from a flaw where negative Content-Length values are incorrectly interpreted as extremely large unsigned lengths, theoretically enabling HTTP request/response smuggling. This vulnerability carries a CVSS score of 6.5 (Medium), indicating a network attack vector with low complexity, and potential low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.4.0CPE matchmatch criteria | cpe:2.3:a:capnproto:capnproto:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.