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Fencer Vulns
high 7.5

CVE-2026-94440 json

Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart

published 2026-10-08 31 d ago modified 2026-10-16 23 d ago also BIT-golang-2026-94440 , EUVD-2026-95423 , GO-2026-6608

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes.

Patch / fix

  • bitnami golang 1.26.9, 1.27.2
  • go stdlib 1.26.9, 1.27.2
  • Go standard library net/textproto 1.26.9, 1.27.2
  • Go standard library mime/multipart 1.26.9, 1.27.2
  • golang-1.26 Debian 14 1.26.9-1
  • golang-1.27 Debian 14 1.27.2-1

debian advisories DEBIAN-CVE-2026-94440

  • golang-1.22 Ubuntu 22.04 LTS 1.22.2-2~22.04.4
  • golang-1.22 Ubuntu 24.04 LTS 1.22.2-2ubuntu0.5

ubuntu advisories UBUNTU-CVE-2026-94440

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • go1.26-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.26.10-150000.1.21.2
  • go1.26-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 1.26.10-150600.13.18.1
  • go1.26 SLES for SAP applications 16.0, SLES 16.0 1.26.9-160000.1.1
  • go1.27 SLES for SAP applications 16.0, SLES 16.0 1.27.2-160000.1.1
  • go1.26 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 1.26.9-150000.1.33.1
  • go1.27 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 1.27.2-150000.1.12.1

suse advisories SUSE-SU-2026:4867-1SUSE-SU-2026:4866-1SUSE-SU-2026:24239-1SUSE-SU-2026:24237-1SUSE-SU-2026:4629-1SUSE-SU-2026:4625-1

  • tempo-cli openSUSE Tumbleweed 3.1.1-1.1
  • go1.26 openSUSE Leap 16.0 1.26.9-160000.1.1
  • go1.27 openSUSE Leap 16.0 1.27.2-160000.1.1
  • rclone openSUSE Tumbleweed 1.75.2-1.1
  • go1.27 openSUSE Tumbleweed 1.27.2-1.1
  • go1.26 openSUSE Tumbleweed 1.26.9-1.1

opensuse advisories openSUSE-SU-2026:12351-1openSUSE-SU-2026:22095-1openSUSE-SU-2026:22093-1openSUSE-SU-2026:12112-1openSUSE-SU-2026:12101-1openSUSE-SU-2026:12093-1

  • delve AlmaLinux 10 1.26.1-3.el10_2
  • opentelemetry-collector AlmaLinux 10 0.158.0-2.el10_2
  • opentelemetry-collector AlmaLinux 9 0.158.0-2.el9_8
  • yggdrasil AlmaLinux 10 0.4.9.2-1.el10_2.4
  • grafana AlmaLinux 10 10.2.6-28.el10_2.9
  • grafana-selinux AlmaLinux 10 10.2.6-28.el10_2.9
  • grafana AlmaLinux 8 9.2.10-36.el8_10
  • grafana-selinux AlmaLinux 8 9.2.10-36.el8_10

almalinux advisories ALSA-2026:95519ALSA-2026:93596ALSA-2026:93617ALSA-2026:91138ALSA-2026:89732ALSA-2026:88188

  • delve Rocky Linux 10 1.26.1-3.el10_2
  • opentelemetry-collector Rocky Linux 10 0.158.0-2.el10_2
  • opentelemetry-collector Rocky Linux 9 0.158.0-2.el9_8
  • yggdrasil Rocky Linux 10 0.4.9.2-1.el10_2.4
  • grafana Rocky Linux 10 10.2.6-28.el10_2.9

rocky linux advisories RLSA-2026:95519RLSA-2026:93596RLSA-2026:93617RLSA-2026:91138RLSA-2026:89732

  • go Alpine 3.24 1.26.9-r0

alpine advisories ALPINE-CVE-2026-94440

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-94440 updated cvss 7.5

net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing

  • Red Hat OpenShift Developer Tools and Services helm 3.22.0-90.el9
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Pipelines openshift-pipelines-client 1.15.3-11580.el8
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Serverless kn-workflow-plugin 1.38.1-1.el9, openshift-serverless-clients 1.17.0-4.el9 Red Hat OpenShift Service Mesh 3 istio-proxy-selinux, istio-proxy 1.30.5-1.el9, openshift-golang-builder-container
    affected: no fix available
  • Red Hat Ansible Automation Platform 2 receptor 1.6.9-1.el9ap, automation-gateway-proxy 2.6.17-3.el9ap, automation-gateway-proxy-openssl30 2.6.6-2.el9ap, automation-gateway-proxy-openssl32 2.6.6-2.el9ap
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Ceph Storage 7 thrift Red Hat Ceph Storage 8 thrift, thrift-qt, perl-thrift, thrift-glib, python3-thrift Red Hat Ceph Storage 9 thrift, libarrow, parquet-libs Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-cnf 9.0-20240522.1.el9, redhat-certification-preflight 9.42-20261005.el10 Red Hat Edge Manager 1 flightctl 1.3.1-1.el10 Red Hat Enterprise Linux 7 rhc, host-metering, rhc-worker-script, rhc 0.3.13-1.el10_3, host-metering-selinux
    +4 more products
    Red Hat Enterprise Linux 8 rhc, git-lfs, toolbox, toolbox-tests, osbuild-composer, rhc 0.3.13-1.el10_3, +6 more Red Hat Enterprise Linux 9 rhc, delve, git-lfs, grafana, toolbox, grafana-pcp, +19 more Red Hat Enterprise Linux 10 toolbox 0.3-3.el10, rhc 0.3.13-1.el10_3, oci-delta 0.3.0-1.el10, git-lfs 3.7.1-5.el10_2.7, image-builder 52.1-2.el10_2, grafana-pcp 5.3.0-8.el10_2.1, +5 more Red Hat Enterprise Linux AI (RHEL AI) 3 golang
    affected: no fix available
  • Red Hat Hardened Images golang1.25
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 4 cri-o, butane, conmon, podman, skopeo, toolbox, +60 more Red Hat OpenShift Container Platform 5 cri-o, conmon-rs, cri-tools, openshift, microshift, kata-containers, +6 more Red Hat OpenShift on AWS rosa 1.2.64-b2f7c89.el8 Red Hat OpenShift Virtualization 4 openshift-golang-builder-container
    affected: no fix available
  • Red Hat OpenStack Platform 16.2 golang-github-infrawatch-apputils 0.5-3.git4ffa970.el8ost Red Hat OpenStack Platform 17.1 golang-uber-multierr, collectd-libpod-stats, golang-uber-atomic 1.5.1-1.el8ost.1, golang-github-infrawatch-apputils 0.5-3.git4ffa970.el8ost Red Hat Service Interconnect 1 skupper-cli 1.8.8-1.el9
    affected: no fix planned “Out of support scope”
show 17 more
  • Red Hat Service Interconnect 2 skupper-cli 1.8.8-1.el9
    affected: no fix available
  • Red Hat streams for Apache Kafka 2 golang-github-danielqsj-kafka_exporter 1.9.0-12.el9
    affected: no fix planned “Out of support scope”
  • Red Hat streams for Apache Kafka 3 golang-github-danielqsj-kafka_exporter 1.9.0-12.el9
    affected: no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, rhoai/odh-mod-arch-autorag-rhel9, +5 more
    under investigation
  • Red Hat Enterprise Linux AppStream (v. 8) grafana 9.2.10-36.el8_10, grafana-pcp 5.1.1-19.el8_10, grafana-selinux 9.2.10-36.el8_10, delve 1.26.1-1.module+el8.10.0+24516+40554724, golang 1.26.10-1.module+el8.10.0+25107+6b50279c, go-toolset 1.26.10-1.module+el8.10.0+25107+6b50279c, +5 more
    fixed: vendor fix RHSA-2026:86203
  • Red Hat Enterprise Linux AppStream (v. 9) golang 1.26.10-1.el9_8, go-toolset 1.26.10-1.el9_8, golang-bin 1.26.10-1.el9_8, golang-src 1.26.10-1.el9_8, golang-misc 1.26.10-1.el9_8, golang-race 1.26.10-1.el9_8, +2 more
    fixed: vendor fix RHSA-2026:86196
  • Red Hat Enterprise Linux AppStream (v. 10) delve 1.26.1-3.el10_2, golang 1.26.10-1.el10_2, grafana 10.2.6-28.el10_2.9, go-toolset 1.26.10-1.el10_2, golang-bin 1.26.10-1.el10_2, golang-src 1.26.10-1.el10_2, +6 more
    fixed: vendor fix RHSA-2026:95519
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) osbuild-composer 28.7-7.el8_4, osbuild-composer-core 28.7-7.el8_4, osbuild-composer-worker 28.7-7.el8_4, delve 1.26.1-1.module+el8.4.0+25181+7ce5b91c, golang 1.26.10-2.module+el8.4.0+25201+9a419e96, go-toolset 1.26.10-2.module+el8.4.0+25201+9a419e96, +5 more
    fixed: vendor fix RHSA-2026:90994
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) grafana 7.5.11-12.el8_6, grafana-pcp 3.2.0-4.el8_6.2, delve 1.26.1-1.module+el8.6.0+24782+a062e766, golang 1.26.10-4.module+el8.6.0+25114+90ecdb41, go-toolset 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-bin 1.26.10-4.module+el8.6.0+25114+90ecdb41, +4 more
    fixed: vendor fix RHSA-2026:87246
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) grafana 7.5.15-12.el8_8, grafana-pcp 3.2.0-6.el8_8.2, delve 1.26.1-1.module+el8.8.0+24781+86ad105d, golang 1.26.10-4.module+el8.8.0+25113+a148ecc0, go-toolset 1.26.10-4.module+el8.8.0+25113+a148ecc0, golang-bin 1.26.10-4.module+el8.8.0+25113+a148ecc0, +4 more
    fixed: vendor fix RHSA-2026:87245
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) delve 1.26.1-1.el9_2.2, golang 1.26.10-1.el9_2, go-toolset 1.26.10-1.el9_2, golang-bin 1.26.10-1.el9_2, golang-src 1.26.10-1.el9_2, golang-misc 1.26.10-1.el9_2, +7 more
    fixed: vendor fix RHSA-2026:89888
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) delve 1.26.1-1.el9_4.2, golang 1.26.10-1.el9_4, go-toolset 1.26.10-1.el9_4, golang-bin 1.26.10-1.el9_4, golang-src 1.26.10-1.el9_4, grafana-pcp 5.1.1-10.el9_4, +7 more
    fixed: vendor fix RHSA-2026:89885
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) delve 1.26.1-3.el10_0, golang 1.26.10-1.el10_0, yggdrasil 0.4.7-6.el10_0.1, go-toolset 1.26.10-1.el10_0, golang-bin 1.26.10-1.el10_0, golang-src 1.26.10-1.el10_0, +8 more
    fixed: vendor fix RHSA-2026:89884
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) delve 1.26.1-1.el9_6.2, golang 1.26.10-1.el9_6, go-toolset 1.26.10-1.el9_6, golang-bin 1.26.10-1.el9_6, golang-src 1.26.10-1.el9_6, golang-misc 1.26.10-1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:89933
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) osbuild-composer 28.7-7.el8_4, osbuild-composer-core 28.7-7.el8_4, osbuild-composer-worker 28.7-7.el8_4, delve 1.26.1-1.module+el8.4.0+25181+7ce5b91c, golang 1.26.10-2.module+el8.4.0+25201+9a419e96, go-toolset 1.26.10-2.module+el8.4.0+25201+9a419e96, +5 more
    fixed: vendor fix RHSA-2026:90994
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) grafana 7.5.11-12.el8_6, grafana-pcp 3.2.0-4.el8_6.2, delve 1.26.1-1.module+el8.6.0+24782+a062e766, golang 1.26.10-4.module+el8.6.0+25114+90ecdb41, go-toolset 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-bin 1.26.10-4.module+el8.6.0+25114+90ecdb41, +4 more
    fixed: vendor fix RHSA-2026:87246
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) grafana 7.5.15-12.el8_8, grafana-pcp 3.2.0-6.el8_8.2, delve 1.26.1-1.module+el8.8.0+24781+86ad105d, golang 1.26.10-4.module+el8.8.0+25113+a148ecc0, go-toolset 1.26.10-4.module+el8.8.0+25113+a148ecc0, golang-bin 1.26.10-4.module+el8.8.0+25113+a148ecc0, +4 more
    fixed: vendor fix RHSA-2026:87245

15 more fixed, 17 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
30 d ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami golang
<1.26.9
>=1.27.0-0, <1.27.2
1.26.9
1.27.2
go stdlib
<1.26.9
>=1.27.0-0, <1.27.2
1.26.9
1.27.2

Affected products

  • Go standard library net/textproto
  • Go standard library mime/multipart

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.