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CVE-2020-26160

Authorization bypass in github.com/dgrijalva/jwt-go

7.5 HighPublic exploitFix available

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

2.16%Up 1.5 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AC:L/AV:N/A:N/C:H/I:N/PR:N/S:U/UI:N
Updated
2026-11-02
EUVDEUVD-2021-1212 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
EUVD-2021-1212
CVSS 3.1
7.5 HighCVSS:3.1/AC:L/AV:N/A:N/C:H/I:N/PR:N/S:U/UI:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-w73w-5m7g-f7qc 7.5

Authorization bypass in github.com/dgrijalva/jwt-go

jwt-go allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to golang-jwt at version 3.2.1

Record
GHSA-w73w-5m7g-f7qc
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-287, CWE-755
Updated
2026-11-02
NVD 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-287, CWE-755
Updated
2026-11-02
OSVALPINE-CVE-2020-26160 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
ALPINE-CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-03
OSVAZL-41684 7.5

CVE-2020-26160 affecting package dcos-cli for versions less than 1.2.0-15

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
AZL-41684
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-05
Show 8 moreShow less
OSV 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2020-26160 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
DEBIAN-CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVGHSA-w73w-5m7g-f7qc 7.5

Authorization bypass in github.com/dgrijalva/jwt-go

jwt-go allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to golang-jwt at version 3.2.1

Record
GHSA-w73w-5m7g-f7qc
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-287, CWE-755
Updated
2026-11-02
OSVRHSA-2021:2042 7.5

Red Hat Security Advisory: Red Hat OpenShift Container Storage 4.7 RPM security, bug fix, and enhancement update

Record
RHSA-2021:2042
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-26160 7.5

jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.

Record
UBUNTU-CVE-2020-26160
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVGO-2020-0017 No score

Authorization bypass in github.com/dgrijalva/jwt-go

If a JWT contains an audience claim with an array of strings, rather than a single string, and MapClaims.VerifyAudience is called with req set to false, then audience verification will be bypassed, allowing an invalid set of audiences to be provided.

Record
GO-2020-0017
Updated
2026-11-02
OSVopenSUSE-SU-2024:11428-1 No score

telegraf-1.19.0-1.2 on GA media

These are all security issues fixed in the telegraf-1.19.0-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11428-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11668-1 No score

velero-plugin-for-microsoft-azure-1.3.1-1.1 on GA media

These are all security issues fixed in the velero-plugin-for-microsoft-azure-1.3.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11668-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/dgrijalva/jwt-go/v4
Go
 before 4.0.0-preview1
4.0.0-preview1
github.com/dgrijalva/jwt-go
Go
 0.0.0-20150717181359-44718f8a89b0 to 3.2.0 None known
gitea
Alpine:v3.14
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.15
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.16
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.17
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.18
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.19
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.20
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.21
 before 1.14.6-r0
1.14.6-r0
Show 18 moreShow less
Affected packages
PackageAffectedFixed
gitea
Alpine:v3.22
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.23
 before 1.14.6-r0
1.14.6-r0
gitea
Alpine:v3.24
 before 1.14.6-r0
1.14.6-r0
dcos-cli
Azure Linux:3
 before 1.2.0-15
1.2.0-15
golang-github-dgrijalva-jwt-go
Debian:12
 before 3.2.0-3
3.2.0-3
github.com/dgrijalva/jwt-go
Go
 0.0.0-20150717181359-44718f8a89b0 and later None known
mcg
Red Hat:openshift_container_storage:4.7::el8
From an advisory covering 2 CVEs
 before 0:5.7.0-69.85e2026.5.7.el8
0:5.7.0-69.85e2026.5.7.el8
golang-github-dgrijalva-jwt-go
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.3.0-1
 None known
golang-github-dgrijalva-jwt-go
Ubuntu:18.04:LTS
 All versions, plus listed versions
3.0.0.1+REALLY.2.6.0-13.0.0.1+REALLY.2.6.0-23.0.0.1+REALLY.2.6.0-3
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-1
 None known
golang-github-dgrijalva-jwt-go
Ubuntu:20.04:LTS
 All versions, plus listed versions
3.0.0.1+REALLY.2.6.0-33.2.0-1
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-4
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-4build12.0.0+git2019.04.19.git.78fb45d3c9-4ubuntu0.24.04.12.0.0+git2019.04.19.git.78fb45d3c9-4ubuntu0.24.04.22.0.0+git2019.04.19.git.78fb45d3c9-4ubuntu0.24.04.3
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:25.10
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-4build1
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:26.10
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-4build2
 None known
golang-github-coreos-discovery-etcd-io
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.0.0+git2019.04.19.git.78fb45d3c9-4build12.0.0+git2019.04.19.git.78fb45d3c9-4build2
 None known
telegraf
openSUSE:Tumbleweed
 before 1.19.0-1.2
1.19.0-1.2
velero-plugin-for-microsoft-azure
openSUSE:Tumbleweed
 before 1.3.1-1.1
1.3.1-1.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubmlbrilliance/aurora-demo-lockfile2026-05-11

History

History
RecordedChangedSources
affected
factsOSV
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

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

In short

CVE-2020-26160 is a high vulnerability (CVSS 7.5) in Jwt-go Project Jwt-go, published September 30, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.16%, the 82nd percentile. Fixed in github.com/dgrijalva/jwt-go/v4 4.0.0-preview1.

References

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