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Response snapshot Oct 27, 2026, 14:11 UTC

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VulnerabilityCVE-2022-39366

acryl-datahub missing JWT signature check

The [`StatelessTokenService`](https://github.com/datahub-project/datahub/blob/aa146db611e3a4ca3aa17bb740783f789d4444d3/metadata-service/auth-impl/src/main/java/com/datahub/authentication/token/StatelessTokenService.

At a glance

Exploited
Not known
Severity
9.9 Critical (CVSS 3.1)
Chance of exploitation
1.1% in the next 30 days
Sources
1 source

What to do

GitHub lists first patched versions: acryl-datahub: 0.8.45. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-r8gm-v65f-c973 (opens a new tab)

What happened

# Missing JWT signature check (`GHSL-2022-078`)

The [`StatelessTokenService`](https://github.com/datahub-project/datahub/blob/aa146db611e3a4ca3aa17bb740783f789d4444d3/metadata-service/auth-impl/src/main/java/com/datahub/authentication/token/StatelessTokenService.java#L30) of the DataHub metadata service (GMS) does not verify the signature of JWT tokens.

This allows an attacker to connect to DataHub instances as any user if Metadata Service authentication is enabled. This vulnerability occurs because the `StatelessTokenService` of the Metadata service uses the [`parse`](https://github.com/datahub-project/datahub/blob/aa146db611e3a4ca3aa17bb740783f789d4444d3/metadata-service/auth-impl/src/main/java/com/datahub/authentication/token/StatelessTokenService.

java#L134) method of `io.jsonwebtoken.JwtParser`, which does not perform a verification of the cryptographic token signature. This means that JWTs are accepted regardless of the used algorithm.

Continue reading

#### Impact

This issue may lead to an authentication bypass.

#### Resources

* [CodeQL: Missing JWT signature check](https://codeql.github.com/codeql-query-help/java/java-missing-jwt-signature-check/)

Affected package ranges reported by GitHub: acryl-datahub: < 0.8.45

Scores and how they were measured

CVSS base severity

9.9

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

1.1%

Scored Percentile 65.8%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-r8gm-v65f-c973 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-r8gm-v65f-c973, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  3. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2022-39366, scored 2026-10-26. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 26). acryl-datahub missing JWT signature check (CVE-2022-39366). https://kevwire.com/record/CVE-2022-39366

MLA

"acryl-datahub missing JWT signature check (CVE-2022-39366)." KEVWire, 26 Oct. 2026, kevwire.com/record/CVE-2022-39366.

Chicago

KEVWire. "acryl-datahub missing JWT signature check (CVE-2022-39366)." Last modified October 26, 2026. https://kevwire.com/record/CVE-2022-39366.

Evidence summary (plain text)

acryl-datahub missing JWT signature check (Oct 31, 2022).
The [`StatelessTokenService`](https://github.com/datahub-project/datahub/blob/aa146db611e3a4ca3aa17bb740783f789d4444d3/metadata-service/auth-impl/src/main/java/com/datahub/authentication/token/StatelessTokenService.java#L30) of the DataHub metadata service (GMS) does not verify the signature of JWT tokens. This allows an attacker to connect to DataHub instances as any user if Metadata Service authentication is enabled. This vulnerability occurs because the `StatelessTokenService` of the Metadata service uses the [`parse`](https://github.com/datahub-project/datahub/blob/aa146db611e3a4ca3aa17bb740783f789d4444d3/metadata-service/auth-impl/src/main/java/com/datahub/authentication/token/StatelessTokenService.java#L134) method of `io.jsonwebtoken.JwtParser`, which does not perform a verification of the cryptographic token signature. This means that JWTs are accepted regardless of the used algorithm.

This issue may lead to an authentication bypass.
CVSS 9.9 (version 3.1; evidence as of Oct 26, 2026; https://github.com/advisories/GHSA-r8gm-v65f-c973).
EPSS 1.1% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2022-39366&date=2026-10-26).
Sources:
GitHub-reviewed advisory GHSA-r8gm-v65f-c973: https://github.com/advisories/GHSA-r8gm-v65f-c973
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2022-39366&date=2026-10-26
Record ID: CVE-2022-39366.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 13:46 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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