How severe is CVE-2026-1788?

CVE-2026-1788 has a CVSS 4.0 base score of 6.6, rated medium severity.

Is CVE-2026-1788 being actively exploited?

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

How do I fix CVE-2026-1788?

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

Does CVE-2026-1788 have an EU (EUVD) identifier?

Yes. CVE-2026-1788 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5215.

When was CVE-2026-1788 published?

CVE-2026-1788 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2026-1788

CVE-2026-1788 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.6. 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-787.

Key facts

Severity: Medium (CVSS 4.0 base score 6.6)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5215
Weakness: CWE-787
Published: 2026-02-03
Last modified: 2026-06-17

Description

: Out-of-bounds Write vulnerability in Xquic Project Xquic Server xquic on Linux (QUIC protocol implementation, packet processing module modules) allows : Buffer Manipulation.This issue affects Xquic Server: through 1.8.3.

Frequently asked questions

What is CVE-2026-1788?: : Out-of-bounds Write vulnerability in Xquic Project Xquic Server xquic on Linux (QUIC protocol implementation, packet processing module modules) allows : Buffer Manipulation.This issue affects Xquic Server: through 1.8.3.
How severe is CVE-2026-1788?: CVE-2026-1788 has a CVSS 4.0 base score of 6.6, rated medium severity.
Is CVE-2026-1788 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-1788?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1788 have an EU (EUVD) identifier?: Yes. CVE-2026-1788 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5215.
When was CVE-2026-1788 published?: CVE-2026-1788 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://github.com/alibaba/xquic

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