How severe is CVE-2026-22863?

CVE-2026-22863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-22863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22863?

CVE-2026-22863 affects Deno. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22863?

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

Does CVE-2026-22863 have an EU (EUVD) identifier?

Yes. CVE-2026-22863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2936.

When was CVE-2026-22863 published?

CVE-2026-22863 was published on 2026-01-15 and last updated on 2026-06-17.

CVE-2026-22863

CVE-2026-22863 is a high-severity vulnerability in Deno with a CVSS 3.x base score of 7.5. 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-325.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2936
Weakness: CWE-325
Affected product: Deno
Published: 2026-01-15
Last modified: 2026-06-17

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.6.0, node:crypto doesn't finalize cipher. The vulnerability allows an attacker to have infinite encryptions. This can lead to naive attempts at brute forcing, as well as more refined attacks with the goal to learn the server secrets. This vulnerability is fixed in 2.6.0.

Frequently asked questions

What is CVE-2026-22863?: Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.6.0, node:crypto doesn't finalize cipher. The vulnerability allows an attacker to have infinite encryptions. This can lead to naive attempts at brute forcing, as well as more refined attacks with the goal to learn the server secrets. This vulnerability is fixed in 2.6.0.
How severe is CVE-2026-22863?: CVE-2026-22863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-22863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22863?: CVE-2026-22863 affects Deno. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22863 have an EU (EUVD) identifier?: Yes. CVE-2026-22863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2936.
When was CVE-2026-22863 published?: CVE-2026-22863 was published on 2026-01-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*

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