ghinstallation returns app JWT in error responses

published 2022-12-19 3 y ago modified 2026-06-17 4 mo ago also GHSA-h4q8-96p6-jcgr , GO-2022-1178 , EUVD-2022-7643

cvss: 5.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

ghinstallation provides transport, which implements http.RoundTripper to provide authentication as an installation for GitHub Apps. In ghinstallation version 1, when the request to refresh an installation token failed, the HTTP request and response would be returned for debugging. The request contained the bearer JWT for the App, and was returned back to clients. This token is short lived (10 minute maximum). This issue has been patched and is available in version 2.0.0.

Patch / fix

fixed in 2 links 2

go github.com/bradleyfalzon/ghinstallation 1.1.2-0.20210308182858-d24f14f8be70, 2.0.0
ghinstallation_project ghinstallation 2.0.0

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-2022-39304 updated 2026-06-26 cvss 5.0

ghinstallation: Leak of bearer JWT from http.RoundTripper response

Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/applicationset-rhel8
affected: no fix available
Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/multicluster-operators-subscription-rhel8 Red Hat Advanced Cluster Security 3 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-scanner-rhel8 Red Hat OpenShift GitOps openshift-gitops-1/gitops-rhel8, openshift-gitops-1/gitops-rhel8-operator
not affected: vulnerable code not present

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: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-16)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/bradleyfalzon/ghinstallation/blob/24e56b3fb7669f209134a01eff731d7e2ef72a5c/transport.go#L172-L174 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:L
NVD	3.1	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	5.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
go	github.com/bradleyfalzon/ghinstallation	<2.0.0 <1.1.2-0.20210308182858-d24f14f8be70	2.0.0 1.1.2-0.20210308182858-d24f14f8be70

Affected products

bradleyfalzon ghinstallation

Classification

Weakness

CWE-209 Generation of Error Message Containing Sensitive Information

References

github.com /bradleyfalzon/ghinstallation/commit/d24f14f8be70d94129d76026e8b0f4f9170c8c3e
web, patch, third-party-advisory
github.com /bradleyfalzon/ghinstallation/security/advisories/GHSA-h4q8-96p6-jcgr
web, patch, third-party-advisory, advisory
github.com /bradleyfalzon/ghinstallation/blob/24e56b3fb7669f209134a01eff731d7e2ef72a5c/transport.go#L172-L174
web, exploit, third-party-advisory
docs.github.com /en/developers/apps/building-github-apps/authenticating-with-github-apps#authenticating-as-an-installation
web, technical-description, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-39304
advisory
github.com /bradleyfalzon/ghinstallation
package
pkg.go.dev /vuln/GO-2022-1178
web
securitylab.github.com /advisories/GHSL-2022-061_ghinstallation
advisory

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.

Summary