by Kastro
Paper/Archive/CVE-2025-22871

CVE-2025-22871

Go standard library net/http/internal — Request smuggling due to acceptance of invalid chunked data in net/http

EPSS 0.8%CVSS 9.1
critical.is priorityof 100
39
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 57.4.574 × 2011.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.

Affected

ProductAffectedFixed inSource
net/http/internal< 1.23.81.23.8CNA
net/http/internal1.24.0-0 – < 1.24.21.24.2CNA
SENTRON 7KT PAC1261 Data Manager< V2.1.0V2.1.0siemens-SADP

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgo.dev/cl/652998refgo.dev/issue/71988refgroups.google.com/g/golang-announce/c/Y2uBTVKjBQkrefpkg.go.dev/vuln/GO-2025-3563refopenwall.com/lists/oss-security/2025/04/04/4refcert-portal.siemens.com/productcert/html/ssa-783943.html