How severe is CVE-2026-27837?

CVE-2026-27837 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-27837 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27837?

CVE-2026-27837 affects Dottie Project Dottie. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27837?

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

Does CVE-2026-27837 have an EU (EUVD) identifier?

Yes. CVE-2026-27837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8788.

When was CVE-2026-27837 published?

CVE-2026-27837 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27837

CVE-2026-27837 is a medium-severity vulnerability in Dottie Project Dottie with a CVSS 3.x base score of 6.3. 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-1321.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8788
Weakness: CWE-1321
Affected product: Dottie Project Dottie
Published: 2026-02-26
Last modified: 2026-06-17

Description

Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-26132. The prototype pollution guard introduced in commit `7d3aee1` only validates the first segment of a dot-separated path, allowing an attacker to bypass the protection by placing `__proto__` at any position other than the first. Both `dottie.set()` and `dottie.transform()` are affected. Version 2.0.7 contains an updated fix to address the residual vulnerability.

Frequently asked questions

What is CVE-2026-27837?: Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-26132. The prototype pollution guard introduced in commit `7d3aee1` only validates the first segment of a dot-separated path, allowing an attacker to bypass the protection by placing `__proto__` at any position other than the first. Both `dottie.set()` and `dottie.transform()` are affected. Version 2.0.7 contains an updated fix to address the residual vulnerability.
How severe is CVE-2026-27837?: CVE-2026-27837 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-27837 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27837?: CVE-2026-27837 affects Dottie Project Dottie. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27837?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27837 have an EU (EUVD) identifier?: Yes. CVE-2026-27837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8788.
When was CVE-2026-27837 published?: CVE-2026-27837 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dottie_project:dottie:*:*:*:*:*:node.js:*:*

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