No exploitation reportedFix available

CVE-2025-22871

Q: Is CVE-2025-22871 actively exploited?

Active exploitation of CVE-2025-22871 has not been confirmed. Its EPSS score was 0.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2025-22871?

CVE-2025-22871 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2025-04-08
Fixed in1.24.2 · 1.23.8

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2025-04-0820:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-22871?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-22871?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV

golang

Branch	Affected	Fixed in	Source
1.24	≥ 1.24.0-0, < 1.24.2	1.24.2	OSV
1.23	< 1.23.8	1.23.8	OSV

stdlib

Branch	Affected	Fixed in	Source
1.24	≥ 1.24.0-0, < 1.24.2	1.24.2	OSV
1.23	< 1.23.8	1.23.8	OSV

spiral/roadrunner

Branch	Affected	Fixed in	Source
2025.1	< 2025.1.0	2025.1.0	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.10.1-2.module_el8.10.0+3901+4b80ecd7
aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.10.1-2.module_el8.10.0+3909+6e1c1eb7
aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.10.1-2.module_el8.10.0+4016+efd18bf8
buildahAlmaLinux:10all versions · fixed in 2:1.39.4-2.el10_0and 1 other package
buildahAlmaLinux:9all versions · fixed in 2:1.39.4-2.el9_6and 1 other package
buildahAlmaLinux:8all versions · fixed in 2:1.33.12-2.module_el8.10.0+4016+efd18bf8and 1 other package
cockpit-podmanAlmaLinux:8all versions · fixed in 84.1-1.module_el8.10.0+4016+efd18bf8
conmonAlmaLinux:8all versions · fixed in 3:2.1.10-1.module_el8.10.0+3970+8445edf6

78 more package ranges on OSV.dev

Vendor advisories

ICSA-26-134-14 CISA1 known affected
Siemens SENTRON 7KT PAC1261 Data Manager
SENTRON 7KT PAC1261 Data Manager
RHSA-2026:12282 Red Hat Product Security179 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.12.88 bug fix and security update
RHSA-2025:22683 Red Hat Product Security4 products fixed
Red Hat Security Advisory: multicluster engine for Kubernetes v2.7.7 security update
RHSA-2025:11749 Red Hat Product Security4 products fixed
Red Hat Security Advisory: Updated 8.1 container image is now available: security and bug fix update
RHSA-2025:11396 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift API for Data Protection (OADP) 1.4.5 security and bug fix update
RHSA-2025:10781 Red Hat Product Security622 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.16.44 bug fix and security update

3 more advisories

Full record on NVD

Fix

Update golang to 1.24.2 · 1.23.8
Vendor fix CISA ICSA-26-134-14 · 1 productUpdate to V2.1.0 or later version
Vendor fix Red Hat Product Security RHSA-2026:12282 · 179 productsFor OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2025:22683 · 4 productsFor multicluster engine for Kubernetes, see the following documentation for details on how to install the images: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/clusters/cluster_mce_overview#mce-install-intro
Vendor fix Red Hat Product Security RHSA-2025:11749 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2789521 For supported configurations, refer to: https://access.redhat.com/articles/1548993
Vendor fix Red Hat Product Security RHSA-2025:11396 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Vendor fix Red Hat Product Security RHSA-2025:10781 · 622 productsFor OpenShift Container Platform 4.16 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2025-04-18
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.12025-04-18
FIRST EPSSEPSS score0.8 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2025-04-08
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2025-22871?

Is CVE-2025-22871 actively exploited?

Active exploitation of CVE-2025-22871 has not been confirmed. Its EPSS score was 0.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-22871?

CVE-2025-22871 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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