How severe is CVE-2026-52794?

CVE-2026-52794 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 none, integrity none, and availability high.

Is CVE-2026-52794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-52794?

CVE-2026-52794 affects Sentry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-52794?

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-2026-52794 have an EU (EUVD) identifier?

Yes. CVE-2026-52794 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39103.

When was CVE-2026-52794 published?

CVE-2026-52794 was published on 2026-06-24 and last updated on 2026-06-27.

CVE-2026-52794

CVE-2026-52794 is a high-severity vulnerability in Sentry 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39103
Weakness: CWE-1333
Affected product: Sentry
Published: 2026-06-24
Last modified: 2026-06-27

Description

Sentry is an error tracking and performance monitoring tool. From 24.4.0 until 26.5.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Sentry's event ingestion pipeline, where a regex applied to attacker-controlled fields on incoming events can be made to consume disproportionate CPU time. This vulnerability is fixed in 26.5.2.

Frequently asked questions

What is CVE-2026-52794?: Sentry is an error tracking and performance monitoring tool. From 24.4.0 until 26.5.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Sentry's event ingestion pipeline, where a regex applied to attacker-controlled fields on incoming events can be made to consume disproportionate CPU time. This vulnerability is fixed in 26.5.2.
How severe is CVE-2026-52794?: CVE-2026-52794 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 none, integrity none, and availability high.
Is CVE-2026-52794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-52794?: CVE-2026-52794 affects Sentry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-52794?: 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-2026-52794 have an EU (EUVD) identifier?: Yes. CVE-2026-52794 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39103.
When was CVE-2026-52794 published?: CVE-2026-52794 was published on 2026-06-24 and last updated on 2026-06-27.

References

Affected products (1)

cpe:2.3:a:sentry:sentry:*:*:*:*:*:*:*:*

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