CVE-2026-24137

mediumpriority · track · 0EPSS 0.004 · 32 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.39% (32nd) EPSS

CVSS 5.8 · medium

Is it mine?

2 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · suse_csaf

EPSS · scored 2026-10-23

sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedvexctl-0:0.4.1+git78.f951e3a-150000.1.11.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-150000.1.11.1.ppc64le as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-150000.1.11.1.s390x as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-150000.1.11.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.aarch64 as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.aarch64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.ppc64le as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.ppc64le as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.s390x as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.s390x as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.x86_64 as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-150400.3.35.1.x86_64 as component of openSUSE Leap 15.6suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-150400.3.35.1.noarch as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-150400.3.35.1.noarch as component of SUSE Linux Enterprise Module for Basesystem 15 SP7suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.aarch64 as component of SUSE Linux Enterprise Server 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.aarch64 as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.ppc64le as component of SUSE Linux Enterprise Server 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.ppc64le as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.s390x as component of SUSE Linux Enterprise Server 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.s390x as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.x86_64 as component of SUSE Linux Enterprise Server 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.x86_64 as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedvexctl-0:0.4.1+git78.f951e3a-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-fish-completion-0:3.0.5-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-fish-completion-0:3.0.5-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-fish-completion-0:3.0.5-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-fish-completion-0:3.0.5-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.aarch64 as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.ppc64le as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.s390x as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-0:3.0.5-160000.1.1.x86_64 as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-bash-completion-0:3.0.5-160000.1.1.noarch as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-fish-completion-0:3.0.5-160000.1.1.noarch as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcosign-zsh-completion-0:3.0.5-160000.1.1.noarch as component of openSUSE Leap 16.0suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

Technical severity, 0–10. One row per scoring source.

5.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.8mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:Nsecondary · ENISA EU

v3.15.8mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.3 · impact 4

v3.15.8mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:Nsecondary · OSV

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:Nsecondary · SUSE Product Security

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22US

affected products (2)

Products and version ranges known to be affected.

sigstore sigstore≤ < 1.10.4enisa_euvdEU
Go github.com/sigstore/sigstore< 1.10.4osvUSpkg:golang/github.com/sigstore/sigstore

advisories (8)

Vendor and ecosystem advisories describing this.

SUSE-SU-2026:0592-1Security update for vexctl2026-02-20csaf · suse_csafDE
Security update for vexctl
SUSE-SU-2026:0777-1Security update for cosign2026-03-03csaf · suse_csafDE
Security update for cosign
SUSE-SU-2026:20904-1Security update for cosign2026-03-18csaf · suse_csafDE
Security update for cosign
openSUSE-SU-2026:10230-1vexctl-0.4.1+git78.f951e3a-1.1 on GA media2026-02-19csaf · suse_csafDE
vexctl-0.4.1+git78.f951e3a-1.1 on GA media
openSUSE-SU-2026:10235-1cosign-3.0.5-1.1 on GA media2026-02-23csaf · suse_csafDE
cosign-3.0.5-1.1 on GA media
openSUSE-SU-2026:20386-1Security update for cosign2026-03-18csaf · suse_csafDE
Security update for cosign
GHSA-fcv2-xgw5-pqxfsigstore legacy TUF client allows for arbitrary file writes with target cache path traversal2026-01-22ghsa · osvUS
## Summary The legacy TUF client `pkg/tuf/client.go`, which supports caching target files to disk, constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata, but it does not validate that the resulting path stays within the cache base directory. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. As this TUF client implementation is deprecated, users should migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf as soon as possible. Note that this does not affect users of the public Sigstore deployment, where TUF metadata is validated by a quorum of trusted collaborators. ## Impact A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. ## Workarounds Users can disable disk caching for the legacy client by setting `SIGSTORE_NO_CACHE=true` in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.
GO-2026-4358Sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal in github.com/sigstore/sigstore2026-02-19vendor · osvUS
Sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal in github.com/sigstore/sigstore

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv suse_csaf NVD CVE.org MITRE

published 2026-01-23modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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