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Response snapshot Oct 29, 2026, 02:31 UTC

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VulnerabilityCVE-2026-116586

Go JOSE: Panics in JSON parsing

Parsing deeply nested JSON structures can hit Go's stack limit, causing the application to crash. Note: this advisory is the same as https://github.com/go-jose/go-jose/security/advisories/GHSA-6mp9-8xrw-74r4. Denial of service vulnerability.

At a glance

Exploited
Not known
Severity
6.9 Medium (CVSS 4.0)
Chance of exploitation
0.3% in the next 30 days
Sources
1 source

What to do

GitHub lists first patched versions: github.com/go-jose/go-jose/v4: 4.1.5. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-vvm8-gf78-28g4 (opens a new tab)

What happened

Summary

Parsing deeply nested JSON structures can hit Go's stack limit, causing the application to crash.

Note: this advisory is the same as https://github.com/go-jose/go-jose/security/advisories/GHSA-6mp9-8xrw-74r4.

Impact

Continue reading

Denial of service vulnerability. Any application that parses untrusted JSON via go-jose is exposed.

Workarounds

Reject large inputs before parsing them.

Acknowledgements

Thanks to Dohyun Kim (@azza999), Joshua Rogers of AISLE Research, and Sueun Cho for alerting us to the need to patch this.

Affected package ranges reported by GitHub: github.com/go-jose/go-jose/v4: < 4.1.5 github.com/go-jose/go-jose/v3: <= 3.0.5

Scores and how they were measured

CVSS base severity

6.9

Version 4.0As of

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Measurement source (opens a new tab)

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

EPSS probability

0.3%

Scored Percentile 21.7%

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-vvm8-gf78-28g4 (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-vvm8-gf78-28g4, 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-2026-116586, scored 2026-10-28. 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 28). Go JOSE: Panics in JSON parsing (CVE-2026-116586). https://kevwire.com/record/CVE-2026-116586

MLA

"Go JOSE: Panics in JSON parsing (CVE-2026-116586)." KEVWire, 28 Oct. 2026, kevwire.com/record/CVE-2026-116586.

Chicago

KEVWire. "Go JOSE: Panics in JSON parsing (CVE-2026-116586)." Last modified October 28, 2026. https://kevwire.com/record/CVE-2026-116586.

Evidence summary (plain text)

Go JOSE: Panics in JSON parsing (Oct 28, 2026).
Parsing deeply nested JSON structures can hit Go's stack limit, causing the application to crash.

Note: this advisory is the same as https://github.com/go-jose/go-jose/security/advisories/GHSA-6mp9-8xrw-74r4.

Denial of service vulnerability. Any application that parses untrusted JSON via go-jose is exposed.

Reject large inputs before parsing them.

Thanks to Dohyun Kim (@azza999), Joshua Rogers of AISLE Research, and Sueun Cho for alerting us to the need to patch this.
CVSS 6.9 (version 4.0; evidence as of Oct 28, 2026; https://github.com/advisories/GHSA-vvm8-gf78-28g4).
EPSS 0.3% for the following 30 days, scored Oct 28, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-116586&date=2026-10-28).
Sources:
GitHub-reviewed advisory GHSA-vvm8-gf78-28g4: https://github.com/advisories/GHSA-vvm8-gf78-28g4
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-2026-116586&date=2026-10-28
Record ID: CVE-2026-116586.
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 29, 2026, 02:16 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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