How severe is CVE-2021-26198?

CVE-2021-26198 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-26198 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26198?

CVE-2021-26198 affects Jerryscript. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26198?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26198 published?

CVE-2021-26198 was published on 2021-06-10 and last updated on 2026-06-17.

CVE-2021-26198

CVE-2021-26198 is a medium-severity vulnerability in Jerryscript with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jerryscript
Published: 2021-06-10
Last modified: 2026-06-17

Description

An issue was discovered in JerryScript 2.4.0. There is a SEVG in ecma_deref_bigint in ecma-helpers.c file.

Frequently asked questions

What is CVE-2021-26198?: An issue was discovered in JerryScript 2.4.0. There is a SEVG in ecma_deref_bigint in ecma-helpers.c file.
How severe is CVE-2021-26198?: CVE-2021-26198 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-26198 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26198?: CVE-2021-26198 affects Jerryscript. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26198 published?: CVE-2021-26198 was published on 2021-06-10 and last updated on 2026-06-17.

References

https://github.com/jerryscript-project/jerryscript/issues/4402

Affected products (1)

cpe:2.3:a:jerryscript:jerryscript:2.4.0:*:*:*:*:*:*:*

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