How severe is CVE-2026-22904?

CVE-2026-22904 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-2026-22904 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22904?

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.

Does CVE-2026-22904 have an EU (EUVD) identifier?

Yes. CVE-2026-22904 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6924.

When was CVE-2026-22904 published?

CVE-2026-22904 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2026-22904

CVE-2026-22904 is a critical-severity vulnerability 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6924
Weakness: CWE-121
Published: 2026-02-09
Last modified: 2026-06-17

Description

Improper length handling when parsing multiple cookie fields (including TRACKID) allows an unauthenticated remote attacker to send oversized cookie values and trigger a stack buffer overflow, resulting in a denial‑of‑service condition and possible remote code execution.

Frequently asked questions

What is CVE-2026-22904?: Improper length handling when parsing multiple cookie fields (including TRACKID) allows an unauthenticated remote attacker to send oversized cookie values and trigger a stack buffer overflow, resulting in a denial‑of‑service condition and possible remote code execution.
How severe is CVE-2026-22904?: CVE-2026-22904 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-2026-22904 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-22904?: 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.
Does CVE-2026-22904 have an EU (EUVD) identifier?: Yes. CVE-2026-22904 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6924.
When was CVE-2026-22904 published?: CVE-2026-22904 was published on 2026-02-09 and last updated on 2026-06-17.

References

https://certvde.com/de/advisories/VDE-2026-004

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