Skip to main content
ExploitedNot in CISA KEV yetFix available

CVE-2026-45695

Exploitation confirmed. First attested on 2026-09-10 by GCVE · previdian, GCVE · shadowserver.

  • Published2026-07-16
  • Fixed in0.23.0
  • WeaknessCWE-306 · CWE-78

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

Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior to 0.23.0, Kopia's HTTP server started with --without-password accepts unauthenticated requests to /api/v1/repo/exists and forwards attacker-supplied SFTP storage configuration to blob.NewStorage, where externalSSH: true and sshArguments containing -oProxyCommand=<cmd> can cause exec.CommandContext("ssh") to invoke the command through OpenSSH. This issue is fixed in version 0.23.0.

Timeline

dates in UTC
  1. 2026-07-1616:19CVE publishedNVD
  2. 2026-09-10Listed as exploited by GCVEGCVE
  3. 2026-09-10Exploitation first reportedGCVE

Versions per branch

OSV
kopia/kopia
BranchAffectedFixed in
0.23< 0.23.00.23.0

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

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • kopia
    Affected
    • = < 0.23.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-16

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

  • govulncheck-vulndbopenSUSE:Leap 16.0all versions · fixed in 0.0.20260723T184607-160000.1.1

Vendor advisories

  • CVE-2026-45695 Red Hat Product Security5 known affected

    github.com/kopia/kopia: Kopia: Arbitrary code execution via unauthenticated SFTP configuration in HTTP server.

    rhmtc/openshift-migration-velero-plugin-for-mtc-rhel8 as a component of Migration Toolkit for Containers · oadp/oadp-kubevirt-velero-plugin-rhel9 as a component of OpenShift API for Data Protection · oadp/oadp-mustgather-rhel9 as a component of OpenShift API for Data Protection · +2 more

Full record on NVD

Fix

  1. Update kopia/kopia to 0.23.0
  2. Workaround from the vendor Red Hat Product Security CVE-2026-45695 · 5 productsThis bug can be rendered unusable by making sure that --without-password is not included in startup options for Kopia HTTP server.
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-45695 · 5 productsFix deferred

Detection

read 2026-11-09 09:28 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-07-16
Last Modified
2026-07-16
NVD status
Deferred
GitHub Advisory
GHSA-2q4c-3mrw-63c3

Frequently asked questions

What is CVE-2026-45695?

Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior to 0.23.0, Kopia's HTTP server started with --without-password accepts unauthenticated requests to /api/v1/repo/exists and forwards attacker-supplied SFTP storage configuration to blob.NewStorage, where externalSSH: true and sshArguments containing -oProxyCommand=<cmd> can cause exec.CommandContext("ssh") to invoke the command through OpenSSH. This issue is fixed in version 0.23.0.

Is CVE-2026-45695 actively exploited?

Active exploitation of CVE-2026-45695 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-45695?

CVE-2026-45695 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running kopia/kopia? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record