High severity · published Jun 24, 2026
CVE-2026-52794
Sentry: Inefficient Regular Expression Complexity in sentry
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
sentry · getsentry
>= 24.4.0, < 26.5.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-52794
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-52794
Issue Tracking
https://github.com/getsentry/sentry/pull/116587
Mitigation
https://github.com/getsentry/sentry/security/advisories/GHSA-jjqr-wqg2-p856
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