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CVE-2026-33747

BuildKit vulnerable to malicious frontend causing file escape outside of storage root

8.4 HighFix available

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.51%Up 0.5 points since Mar 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.4

BuildKit vulnerable to malicious frontend causing file escape outside of storage root

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
CVE-2026-33747
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
EUVDEUVD-2026-16518 8.4

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
EUVD-2026-16518
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-4c29-8rgm-jvjj 8.4

BuildKit's Malicious frontend can cause file escape outside of storage root

Impact

When using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context.

Patches

The issue has been fixed in v0.28.1+

Workarounds

Issue requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
GHSA-4c29-8rgm-jvjj
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
NVD 8.4

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
CVE-2026-33747
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
OSVALPINE-CVE-2026-33747 9.8

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
ALPINE-CVE-2026-33747
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVBELL-CVE-2026-33747 9.8
Record
BELL-CVE-2026-33747
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 20 moreShow less
OSV 8.4

BuildKit vulnerable to malicious frontend causing file escape outside of storage root

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
CVE-2026-33747
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
OSVDEBIAN-CVE-2026-33747 9.8

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
DEBIAN-CVE-2026-33747
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-4c29-8rgm-jvjj 8.4

BuildKit's Malicious frontend can cause file escape outside of storage root

Impact

When using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context.

Patches

The issue has been fixed in v0.28.1+

Workarounds

Issue requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
GHSA-4c29-8rgm-jvjj
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
OSVROOT-APP-GOBINARY-CVE-2026-33747 8.4

CVE-2026-33747 in github.com/moby/buildkit - Patched by Root

Root has patched CVE-2026-33747 in the github.com/moby/buildkit package for Root:Go. Multiple fixed versions available.

Record
ROOT-APP-GOBINARY-CVE-2026-33747
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-33747 8.4

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

Record
UBUNTU-CVE-2026-33747
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGO-2026-4858 No score

BuildKit's Malicious frontend can cause file escape outside of storage root in github.com/moby/buildkit

BuildKit's Malicious frontend can cause file escape outside of storage root in github.com/moby/buildkit

Record
GO-2026-4858
Updated
2026-11-02
OSVopenSUSE-SU-2026:10456-1 No score

tailscale-1.96.4-1.1 on GA media

These are all security issues fixed in the tailscale-1.96.4-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10456-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:10472-1 No score

conftest-0.67.1-2.1 on GA media

These are all security issues fixed in the conftest-0.67.1-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10472-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:10651-1 No score

trivy-0.70.0-1.1 on GA media

These are all security issues fixed in the trivy-0.70.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10651-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:11075-1 No score

docker-stable-24.0.9_ce-18.1 on GA media

These are all security issues fixed in the docker-stable-24.0.9_ce-18.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11075-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20702-1 No score

Security update for trivy

This update for trivy fixes the following issues:

Changes in trivy:

  • Update to version 0.70.0 ( bsc#1260193, CVE-2026-33186, bsc#1260971, CVE-2026-33747, bsc#1261052, CVE-2026-33748, bsc#1262389, CVE-2026-39984, bsc#1262893, CVE-2026-34986):
    • release: v0.70.0 [main] (#10105)
    • chore(deps): bump go.opentelemetry.io/otel/sdk from 1.42.0 to 1.43.0 (#10496)
    • chore(deps): bump github.com/sigstore/timestamp-authority/v2 from 2.0.3 to 2.0.6 (#10526)
    • chore(deps): bump the common group across 1 directory with 8 updates (#10540)
    • chore(deps): bump the docker group across 1 directory with 2 updates (#10538)
    • fix: use Development category for GoReleaser discussions (#10530)
    • chore(deps): bump testcontainers-go to v0.42.0 (#10531)
    • chore: update CODEOWNERS (#10529)
    • chore(deps): bump helm.sh/helm/v3 from 3.20.1 to 3.20.2 (#10511)
    • chore(deps): bump github.com/hashicorp/go-getter from 1.8.5 to 1.8.6 (#10510)
    • chore(deps): bump github.com/moby/buildkit from 0.27.1 to 0.28.1 (#10449)
    • ci: migrate from mkdocs-material-insiders to mkdocs-material (#10509)
    • chore: remove aquasecurity/homebrew-trivy tap from GoReleaser (#10508)
    • ci: update runners for workflows that interact with GitHub API (#10502)
    • ci: rename tokens and update runners (#10500)
    • ci: trigger helm chart publishing via helm-charts workflow (#10474)
    • ci: remove ruleset update step from release-please workflow (#10499)
    • ci: use large runner and replace ORG_REPO_TOKEN in release-please workflow (#10498)
    • ci: trigger rpm/deb deployment via trivy-repo workflow (#10476)
    • fix: remove os.Stdout from wazero module config (#10403)
    • chore(deps): bump the common group across 1 directory with 22 updates (#10408)
    • chore(deps): bump google.golang.org/grpc from 1.78.0 to 1.79.3 (#10407)
    • fix(flag): validate template file extension (#10296)
    • fix(sbom): preserve Red Hat BuildInfo when scanning SBOMs without layer info (#10378)
    • fix: handle Go 1.26 GOEXPERIMENT version format change (#10351)
    • fix(python): handle multiple version specifiers in requirements.txt (#10361)
    • ci: run Trivy version bump in trivy-action (#10272)
    • fix(python): nil pointer dereference with optional poetry groups without dependencies (#10359)
    • ci: replace personal email with github-actions[bot] in workflows (#10369)
    • chore: replace smithy epoch parsing with stdlib time.Unix (#10286)
    • test: update golden files for purl changes (#10372)
    • ci: add zizmor to scan GitHub Actions workflows (#10322)
    • refactor: log statuses as strings (#10285)
    • ci: add build provenance attestations for release artifacts (#10316)
    • fix(sbom): add NOASSERTION for licenseDeclared/licenseConcluded in SPDX non-library packages (#10368)
    • fix(report): set correct sarif ROOTPATH uri when scanning a git repository (#10366)
    • perf(plugin): optimize directory traversal by replacing filepath.Walk with filepath.WalkDir (#10325)
    • docs: correct typos in CHANGELOG and diagram (#10320)
    • chore: delete roadmap wf (#10295)
    • ci(helm): bump Trivy version to 0.69.3 for Trivy Helm Chart 0.21.3 (#10310)
    • fix(cyclonedx): include CVSS v4 vulnerability ratings (#10313)
    • fix: detected vulnerability fields in azure and mariner detector (#10275)
    • ci: add persist-credentials: false to checkout steps (#10306)
    • ci(helm): bump Trivy version to 0.69.2 for Trivy Helm Chart 0.21.2 (#10270)
    • chore(deps): bump the common group across 1 directory with 8 updates (#10248)
    • chore(deps): bump go.opentelemetry.io/otel/sdk from 1.39.0 to 1.40.0 (#10257)
    • chore(deps): bump the aws group across 1 directory with 6 updates (#10249)
    • chore(deps): bump github.com/cloudflare/circl from 1.6.1 to 1.6.3 (#10241)
    • ci: remove apidiff workflow (#10259)
    • chore(deps): bump github.com/docker/cli from 29.1.4+incompatible to 29.2.1+incompatible in the docker group across 1 directory (#10221)
    • ci: bump golangci-lint to v2.10 in…
Record
openSUSE-SU-2026:20702-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20809-1 No score

Security update for trivy

This update for trivy fixes the following issues

  • CVE-2025-64702: github.com/quic-go/quic-go/http3: quic-go HTTP/3 QPACK Header Expansion DoS (bsc#1255366).
  • CVE-2025-69725: github.com/go-chi/chi/v5: incorrect input validation in the RedirectSlashes function can lead to an open redirect (bsc#1258513).
  • CVE-2026-25934: github.com/go-git/go-git/v5: improper verification of data integrity values for .pack and .idx files can lead to the consumption of corrupted files (bsc#1258094).
  • CVE-2026-33186: google.golang.org/grpc: authorization bypass due to improper validation of the HTTP/2: path pseudo- header (bsc#1260193).
  • CVE-2026-33747: github.com/moby/buildkit: malicious frontends can craft API messages that cause files to be written outside of the BuildKit state directory (bsc#1260971).
  • CVE-2026-33748: github.com/moby/buildkit: insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository (bsc#1261052).
  • CVE-2026-34986: github.com/go-jose/go-jose/v4: crafted JWE input with a missing encrypted key can lead to a denial of service (bsc#1262893).
  • CVE-2026-39984: github.com/sigstore/timestamp-authority/v2/pkg/verification: improper certificate validation can be used to bypass some authorization controls (bsc#1262389).
  • CVE-2026-41506: github.com/go-git/go-git/v5: HTTP authentication credential leak when following redirects during smart-HTTP clone and fetch operations (bsc#1264873).

Changes for trivy:

  • Updated go-git to 5.18.0.
  • Updated to version 0.70.0.
Record
openSUSE-SU-2026:20809-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20814-1 No score

Security update for docker-stable

This update for docker-stable fixes the following issues

  • CVE-2026-33747: github.com/moby/buildkit: malicious frontends can craft API messages that cause files to be written outside of the BuildKit state directory (bsc#1260967).
  • CVE-2026-33748: github.com/moby/buildkit: insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository (bsc#1261078).
Record
openSUSE-SU-2026:20814-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:22203-1 No score

Security update for tailscale

This update for tailscale fixes the following issues:

Changes in tailscale:

Update to version 1.104.1:

  • Go is updated to version 1.27
  • WireGuard packet buffering uses less memory while waiting for peer handshakes
  • WireGuard packet queue depth scales with CPU core count, reducing peak memory usage under heavy traffic
  • Client-side netmap caching improves start up speed and connectivity when the Tailscale control plane is unreachable
  • WireGuard allocates a single packet buffer for batched I/O, improving throughput and reducing memory usage
  • An issue that could prevent traffic over IPv6 link-local addresses from flowing through direct and Tailscale Peer Relay connections is resolved
  • An issue preventing Linux desktop detection from working on Wayland environments is resolved

Update 1.102.5:

  • The container no longer stops tailscaled when it falls behind on status updates and the connection is closed, which was common on large tailnets. It reconnects instead, and exits only if it cannot reconnect within one minute.

Update 1.102.4:

  • All Platforms
    • Resolved an issue that could cause a loss in connectivity when a netmap update occurs near the time of reauthentication.

Update 1.102.3:

  • All Platforms

    • Changed: Go is updated to version 1.26.6.
    • Fixed: Tailscale refuses host-scoped IPv4 destinations at every point that acts on an unmapped 4via6 address. This fix addresses a security vulnerability described in TS-2026-011.
    • Fixed: When MagicDNS is disabled, unqualified hostnames are correctly forwarded to the configured nameservers.
    • Fixed: Resolved an issue where nodes with Tailnet Lock enabled on large tailnets would experience startup failures.

Update 1.102.2:

  • Fixed: A regression causing incoming Tailscale Funnel connections to fail is resolved.

Update 1.102.1:

  • All Platforms

    • tailscaled_serve_outbound_bytes_total and tailscaled_serve_inbound_bytes_total client metrics report bytes sent to and received from peers on Tailscale Serve connections for Tailscale Services.
    • The tailscale get CLI command returns the current node's preferences.
    • The tailscale whoami CLI command displays information about the current user and device.
    • The tailscale service list CLI command displays Tailscale Services visible to the current node.
    • Node additions and removals are processed in constant time, significantly reducing CPU usage on large tailnets.
    • Tailscale Funnel domains use TLS-ALPN-01 for faster HTTPS certificate renewals.
    • Deprecated formats for 4via6 MagicDNS names are no longer available to use.
    • TLS certificates on idle servers proactively auto-renew in the absence of traffic. Warnings are issued when there is no valid cached certificate.
    • Dials to dual-stack DNS names through an IPv4-only exit node connect to the correct address when using tailscaled in userspace mode.
    • Certificate issuance for multiple domains runs in parallel. Provisioning multiple domains does not stall each certificate behind the previous one.
    • Resolved an issue causing connectivity issues from the operating system waking from sleep in wireguard-go.
    • A node's home DERP region is reported to the coordination server after a profile switch or login, allowing for peers to immediately connect to the node.
    • A memory leak that occurred after a failed WireGuard handshake has been resolved.
    • tailscale status --peers=false command shows the current device name in the output.
    • Resolved an issue that prevented connectivity via Tailscale Peer Relays after a client restart.

  • Linux

    • Assembly crypto routines for 32-bit ARM are available, improving performance on these platforms.
    • Userspace TUN optimizations…
Record
openSUSE-SU-2026:22203-1
Updated
2026-11-02
OSVSUSE-SU-2026:1205-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

Update to version 0.0.20260402T184258 2026-04-02T18:42:58Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4518 CVE-2026-32286 GHSA-jqcq-xjh3-6g23
  • GO-2026-4753 CVE-2026-33487 GHSA-479m-364c-43vc
  • GO-2026-4760 GHSA-hwqm-qvj9-4jr2
  • GO-2026-4762 CVE-2026-33186 GHSA-p77j-4mvh-x3m3
  • GO-2026-4764 GHSA-pcgw-qcv5-h8ch
  • GO-2026-4858 CVE-2026-33747 GHSA-4c29-8rgm-jvjj
  • GO-2026-4859 CVE-2026-33748 GHSA-4vrq-3vrq-g6gg
  • GO-2026-4863 GHSA-g9ww-x58f-9g6m
  • GO-2026-4872 CVE-2026-33907 GHSA-55q8-2gwx-29pc
  • GO-2026-4873 CVE-2026-33906 GHSA-87j9-m7x6-hvw2
  • GO-2026-4874 CVE-2026-33904 GHSA-9h59-p45g-445h
  • GO-2026-4875 CVE-2026-33903 GHSA-f2f3-9cx3-wcmf
  • GO-2026-4876 GHSA-prh4-vhfh-24mj
  • GO-2026-4880 CVE-2026-32695 GHSA-67jx-r9pv-98rj
  • GO-2026-4883 CVE-2026-33997 GHSA-pxq6-2prw-chj9
  • GO-2026-4887 CVE-2026-34040 GHSA-x744-4wpc-v9h2
  • GO-2026-4888 CVE-2026-26060 GHSA-3458-r943-hmx4
  • GO-2026-4889 CVE-2026-26061 GHSA-99hj-44vg-hfcp
  • GO-2026-4890 CVE-2026-34042 GHSA-x34h-54cw-9825
  • GO-2026-4891 CVE-2026-34041 GHSA-xmgr-9pqc-h5vw
  • GO-2026-4892 CVE-2026-29180 GHSA-m2h6-4xpq-qw3m
  • GO-2026-4893 CVE-2026-33433 GHSA-qr99-7898-vr7c
  • GO-2026-4894 CVE-2026-32241 GHSA-vchx-5pr6-ffx2
  • GO-2026-4896 CVE-2026-34204 GHSA-3rh2-v3gr-35p9
  • GO-2026-4897 GHSA-46wh-3698-f2cx
  • GO-2026-4899 GHSA-c279-989m-238f
  • GO-2026-4901 CVE-2026-33030 GHSA-5hf2-vhj6-gj9m
  • GO-2026-4902 CVE-2026-33029 GHSA-cp8r-8jvw-v3qg
  • GO-2026-4903 CVE-2026-33026 GHSA-fhh2-gg7w-gwpq
  • GO-2026-4904 CVE-2026-33032 GHSA-h6c2-x2m2-mwhf
  • GO-2026-4905 CVE-2026-27018 GHSA-jjwv-57xh-xr6r
  • GO-2026-4906 CVE-2026-33028 GHSA-m468-xcm6-fxg4
  • GO-2026-4907 CVE-2026-33027 GHSA-m8p8-53vf-8357
  • GO-2026-4911 CVE-2026-33990 GHSA-x2f5-332j-9xwq
  • GO-2026-4912 CVE-2026-34389 GHSA-4f9r-x588-pp2h
  • GO-2026-4913 CVE-2026-34386 GHSA-9p23-p2m4-2r4m
  • GO-2026-4914 CVE-2026-34385 GHSA-v895-833r-8c45
  • GO-2026-4915 CVE-2026-34388 GHSA-w254-4hp5-7cvv
  • GO-2026-4916 CVE-2026-26233 GHSA-247x-7qw8-fp98
  • GO-2026-4919 CVE-2026-33634 GHSA-69fq-xp46-6x23
Record
SUSE-SU-2026:1205-1
Updated
2026-11-02
OSVSUSE-SU-2026:2120-1 No score

Security update for docker-stable

This update for docker-stable fixes the following issues

  • CVE-2026-33747: github.com/moby/buildkit: malicious frontends can craft API messages that cause files to be written outside of the BuildKit state directory (bsc#1260967).
  • CVE-2026-33748: github.com/moby/buildkit: insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository (bsc#1261078).
Record
SUSE-SU-2026:2120-1
Updated
2026-11-02
OSVSUSE-SU-2026:21851-1 No score

Security update for docker-stable

This update for docker-stable fixes the following issues

  • CVE-2026-33747: github.com/moby/buildkit: malicious frontends can craft API messages that cause files to be written outside of the BuildKit state directory (bsc#1260967).
  • CVE-2026-33748: github.com/moby/buildkit: insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository (bsc#1261078).
Record
SUSE-SU-2026:21851-1
Updated
2026-11-02
OSVSUSE-SU-2026:2578-1 No score

Security update for docker-stable

This update for docker-stable fixes the following issues

  • CVE-2026-33747: github.com/moby/buildkit: malicious frontends can craft API messages that cause files to be written outside of the BuildKit state directory (bsc#1260967).
  • CVE-2026-33748: github.com/moby/buildkit: insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository (bsc#1261078).
  • CVE-2026-33997: Fixed privilege validation bypass during plugin (bsc#1265907).
  • CVE-2026-34040: Fixed Authz zero length regression (bsc#1265929).
Record
SUSE-SU-2026:2578-1
Updated
2026-11-02
OSVUSN-8230-1 No score

docker.io-app vulnerabilities

It was discovered that BuildKit, contained within Docker, incorrectly handled file path validation when processing frontend API messages. An attacker could possibly use this issue to write files outside of the intended state directory. (CVE-2026-33747)

It was discovered that BuildKit, contained within Docker, incorrectly validated the subdir component of Git URL fragments. An attacker could possibly use this issue to access files outside of the checked-out repository root. (CVE-2026-33748)

Record
USN-8230-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/moby/buildkit
Go
 before 0.28.1
0.28.1
buildkit
Alpine:v3.24
 before 0.29.0-r0
0.29.0-r0
docker
Alpine:v3.23
 before 29.3.1-r0
29.3.1-r0
docker
Alpine:v3.24
 before 29.3.1-r0
29.3.1-r0
docker
Alpaquita:stream
 24.0.2-r0 up to 29.3.1-r0
29.3.1-r0
docker.io
Debian:12
 All versions, plus listed versions
20.10.24+dfsg1-120.10.24+dfsg1-1+deb12u120.10.25+dfsg1-120.10.25+dfsg1-220.10.25+dfsg1-3
Show 42 moreShow less
20.10.25+dfsg1-426.1.4+dfsg1-126.1.4+dfsg1-226.1.4+dfsg1-326.1.4+dfsg1-426.1.4+dfsg1-526.1.4+dfsg1-626.1.4+dfsg1-726.1.4+dfsg1-826.1.4+dfsg1-926.1.4+dfsg2-126.1.4+dfsg3-126.1.5+dfsg1-126.1.5+dfsg1-1026.1.5+dfsg1-226.1.5+dfsg1-326.1.5+dfsg1-426.1.5+dfsg1-526.1.5+dfsg1-626.1.5+dfsg1-726.1.5+dfsg1-826.1.5+dfsg1-927.5.1+dfsg1-127.5.1+dfsg1-227.5.1+dfsg2-127.5.1+dfsg3-127.5.1+dfsg3-227.5.1+dfsg3-327.5.1+dfsg3-427.5.1+dfsg3-527.5.1+dfsg3-627.5.1+dfsg4-127.5.1+dfsg4-228.5.2+dfsg1-128.5.2+dfsg2-128.5.2+dfsg3-128.5.2+dfsg3-228.5.2+dfsg4-128.5.2+dfsg4-228.5.2+dfsg4-328.5.2+dfsg4-428.5.2+dfsg4-5
 None known
docker.io
Debian:13
 before 26.1.5+dfsg1-9+deb13u1, plus listed versions
26.1.5+dfsg1-9
26.1.5+dfsg1-9+deb13u1
docker.io
Debian:14
 before 28.5.2+dfsg4-3, plus listed versions
26.1.5+dfsg1-1026.1.5+dfsg1-927.5.1+dfsg1-127.5.1+dfsg1-227.5.1+dfsg2-1
Show 14 moreShow less
27.5.1+dfsg3-127.5.1+dfsg3-227.5.1+dfsg3-327.5.1+dfsg3-427.5.1+dfsg3-527.5.1+dfsg3-627.5.1+dfsg4-127.5.1+dfsg4-228.5.2+dfsg1-128.5.2+dfsg2-128.5.2+dfsg3-128.5.2+dfsg3-228.5.2+dfsg4-128.5.2+dfsg4-2
28.5.2+dfsg4-3
github.com/moby/buildkit
Root:Go
 before v0.26.3-aikido.1
v0.26.3-aikido.1
rootio-github.com/moby/buildkit
Root:Go
 before v0.26.3-root.io.1
v0.26.3-root.io.1
Show 23 moreShow less
Affected packages
PackageAffectedFixed
govulncheck-vulndb
openSUSE:Leap 15.6
From an advisory covering 34 CVEs
 before 0.0.20260402T184258-150000.1.158.1
0.0.20260402T184258-150000.1.158.1
docker-stable
SUSE:Linux Enterprise Server 12 SP5-LTSS
From an advisory covering 4 CVEs
 before 24.0.9_ce-1.37.1
24.0.9_ce-1.37.1
docker-stable
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
From an advisory covering 4 CVEs
 before 24.0.9_ce-1.37.1
24.0.9_ce-1.37.1
docker.io
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.6.2~dfsg1-1ubuntu41.10.2-0ubuntu31.10.2-0ubuntu41.10.3-0ubuntu11.10.3-0ubuntu4
Show 19 moreShow less
1.10.3-0ubuntu51.10.3-0ubuntu61.11.2-0ubuntu5~16.041.12.1-0ubuntu13~16.04.11.12.3-0ubuntu4~16.04.21.12.6-0ubuntu1~16.04.11.13.1-0ubuntu1~16.04.217.03.2-0ubuntu2~16.04.118.06.1-0ubuntu1~16.04.218.06.1-0ubuntu1.2~16.04.118.09.2-0ubuntu1~16.04.118.09.5-0ubuntu1~16.04.218.09.7-0ubuntu1~16.04.118.09.7-0ubuntu1~16.04.418.09.7-0ubuntu1~16.04.518.09.7-0ubuntu1~16.04.618.09.7-0ubuntu1~16.04.718.09.7-0ubuntu1~16.04.9+esm118.09.7-0ubuntu1~16.04.9+esm2
 None known
docker.io
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.13.1-0ubuntu617.03.2-0ubuntu117.03.2-0ubuntu317.03.2-0ubuntu517.12.1-0ubuntu1
Show 22 moreShow less
18.06.1-0ubuntu1~18.04.118.06.1-0ubuntu1.2~18.04.118.09.2-0ubuntu1~18.04.118.09.5-0ubuntu1~18.04.218.09.7-0ubuntu1~18.04.118.09.7-0ubuntu1~18.04.318.09.7-0ubuntu1~18.04.419.03.6-0ubuntu1~18.04.119.03.6-0ubuntu1~18.04.219.03.6-0ubuntu1~18.04.320.10.2-0ubuntu1~18.04.220.10.2-0ubuntu1~18.04.320.10.7-0ubuntu1~18.04.120.10.7-0ubuntu1~18.04.220.10.7-0ubuntu5~18.04.220.10.7-0ubuntu5~18.04.320.10.12-0ubuntu2~18.04.120.10.21-0ubuntu1~18.04.220.10.21-0ubuntu1~18.04.320.10.21-0ubuntu1~18.04.3+esm120.10.21-0ubuntu1~18.04.3+esm220.10.21-0ubuntu1~18.04.3+esm3
 None known
docker.io
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
19.03.2-0ubuntu119.03.6-0ubuntu119.03.8-0ubuntu119.03.8-0ubuntu1.20.0419.03.8-0ubuntu1.20.04.1
Show 15 moreShow less
19.03.8-0ubuntu1.20.04.220.10.2-0ubuntu1~20.04.220.10.2-0ubuntu1~20.04.320.10.7-0ubuntu1~20.04.120.10.7-0ubuntu1~20.04.220.10.7-0ubuntu5~20.04.120.10.7-0ubuntu5~20.04.220.10.12-0ubuntu2~20.04.120.10.21-0ubuntu1~20.04.120.10.21-0ubuntu1~20.04.220.10.21-0ubuntu1~20.04.420.10.21-0ubuntu1~20.04.520.10.21-0ubuntu1~20.04.620.10.21-0ubuntu1~20.04.6+esm120.10.21-0ubuntu1~20.04.6+esm2
 None known
docker.io-app
Ubuntu:Pro:20.04:LTS
 before 26.1.3-0ubuntu1~20.04.1+esm2, plus listed versions
20.10.25-0ubuntu1~20.04.120.10.25-0ubuntu1~20.04.224.0.5-0ubuntu1~20.04.124.0.7-0ubuntu2~20.04.126.1.3-0ubuntu1~20.04.126.1.3-0ubuntu1~20.04.1+esm1
26.1.3-0ubuntu1~20.04.1+esm2
docker.io-app
Ubuntu:22.04:LTS
 before 29.1.3-0ubuntu3~22.04.2, plus listed versions
20.10.25-0ubuntu1~22.04.120.10.25-0ubuntu1~22.04.224.0.5-0ubuntu1~22.04.124.0.7-0ubuntu2~22.04.126.1.3-0ubuntu1~22.04.1
Show 4 moreShow less
27.5.1-0ubuntu3~22.04.127.5.1-0ubuntu3~22.04.228.2.2-0ubuntu1~22.04.129.1.3-0ubuntu3~22.04.1
29.1.3-0ubuntu3~22.04.2
docker.io
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
20.10.7-0ubuntu520.10.7-0ubuntu720.10.12-0ubuntu120.10.12-0ubuntu220.10.12-0ubuntu3
Show 11 moreShow less
20.10.12-0ubuntu3+gke1.24.120.10.12-0ubuntu420.10.21-0ubuntu1~22.04.220.10.21-0ubuntu1~22.04.320.10.21-0ubuntu1~22.04.520.10.21-0ubuntu1~22.04.620.10.21-0ubuntu1~22.04.720.10.21-0ubuntu1~22.04.7+esm120.10.21-0ubuntu1~22.04.7+esm220.10.21-0ubuntu1~22.04.820.10.21-0ubuntu1~22.04.8+esm1
 None known
docker.io-app
Ubuntu:24.04:LTS
 before 29.1.3-0ubuntu3~24.04.2, plus listed versions
24.0.5-0ubuntu124.0.7-0ubuntu124.0.7-0ubuntu224.0.7-0ubuntu324.0.7-0ubuntu4
Show 6 moreShow less
24.0.7-0ubuntu4.126.1.3-0ubuntu1~24.04.127.5.1-0ubuntu3~24.04.127.5.1-0ubuntu3~24.04.228.2.2-0ubuntu1~24.04.129.1.3-0ubuntu3~24.04.1
29.1.3-0ubuntu3~24.04.2
docker.io
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
20.10.24+dfsg1-1ubuntu220.10.25+dfsg1-2ubuntu120.10.25+dfsg1-2ubuntu1+esm120.10.25+dfsg1-2ubuntu1+esm220.10.25+dfsg1-2ubuntu1.24.04.120.10.25+dfsg1-2ubuntu1.24.04.1+esm1
 None known
docker.io
Ubuntu:25.10
 All versions, plus listed versions
26.1.5+dfsg1-9ubuntu1
 None known
docker.io-app
Ubuntu:25.10
 All versions, plus listed versions
27.5.1-0ubuntu327.5.1-0ubuntu428.2.2-0ubuntu129.1.3-0ubuntu3~25.10.1
 None known
docker.io
Ubuntu:26.10
 All versions, plus listed versions
27.5.1+dfsg4-2ubuntu128.5.2+dfsg4-5ubuntu1
 None known
docker.io-app
Ubuntu:26.10
 before 29.1.3-0ubuntu5, plus listed versions
29.1.3-0ubuntu4
29.1.3-0ubuntu5
docker.io
Ubuntu:26.04:LTS
 All versions, plus listed versions
26.1.5+dfsg1-9ubuntu127.5.1+dfsg4-1ubuntu127.5.1+dfsg4-2ubuntu1
 None known
docker.io-app
Ubuntu:26.04:LTS
 before 29.1.3-0ubuntu4.1, plus listed versions
28.2.2-0ubuntu129.1.2-0ubuntu129.1.3-0ubuntu129.1.3-0ubuntu229.1.3-0ubuntu329.1.3-0ubuntu4
29.1.3-0ubuntu4.1
tailscale
openSUSE:Tumbleweed
 before 1.96.4-1.1
1.96.4-1.1
conftest
openSUSE:Tumbleweed
 before 0.67.1-2.1
0.67.1-2.1
trivy
openSUSE:Tumbleweed
From an advisory covering 7 CVEs
 before 0.70.0-1.1
0.70.0-1.1
docker-stable
openSUSE:Tumbleweed
From an advisory covering 8 CVEs
 before 24.0.9_ce-18.1
24.0.9_ce-18.1
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 1734 CVEs
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1
tailscale
openSUSE:Leap 16.0
 before 1.104.1-bp160.1.1
1.104.1-bp160.1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-33747 is a high vulnerability (CVSS 8.4) in Moby Buildkit, published March 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in github.com/moby/buildkit 0.28.1.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 1,568 references and the rest of 3 source descriptions. The JSON record has them.

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