How severe is CVE-2020-8178?

CVE-2020-8178 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8178 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8178?

CVE-2020-8178 affects Jison Project Jison. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8178?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-8178 published?

CVE-2020-8178 was published on 2020-07-15 and last updated on 2026-06-17.

CVE-2020-8178

CVE-2020-8178 is a critical-severity vulnerability in Jison Project Jison with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Jison Project Jison
Published: 2020-07-15
Last modified: 2026-06-17

Description

Insufficient input validation in npm package `jison` <= 0.4.18 may lead to OS command injection attacks.

Frequently asked questions

What is CVE-2020-8178?: Insufficient input validation in npm package `jison` <= 0.4.18 may lead to OS command injection attacks.
How severe is CVE-2020-8178?: CVE-2020-8178 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8178 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8178?: CVE-2020-8178 affects Jison Project Jison. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8178?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-8178 published?: CVE-2020-8178 was published on 2020-07-15 and last updated on 2026-06-17.

References

https://hackerone.com/reports/690010

Affected products (1)

cpe:2.3:a:jison_project:jison:*:*:*:*:*:node.js:*:*

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