CVE-2023-50249Network attack vector

Server hang via unescaped route-parameter regex

Published Dec 20, 2023 · Updated Aug 2, 2024

ReDoS in Sentry Astro SDK 7.78.0 through 7.86.0 allows remote attackers to hang servers via crafted route parameters. The interpolateRouteFromUrlAndParams function in server middleware inserted each parameter value unescaped into a newly constructed regular expression. Exposure requires Sentry middleware plus a route with at least two path parameters; repeated crafted requests can consume CPU and hang the application server.

CVSS severity8.6
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ReDoS in Sentry Astro SDK 7.78.0 through 7.86.0 allows remote attackers to hang servers via crafted route parameters. The interpolateRouteFromUrlAndParams function in server middleware inserted each parameter value unescaped into a newly constructed regular expression. Exposure requires Sentry middleware plus a route with at least two path parameters; repeated crafted requests can consume CPU and hang the application server.

The record

CVE
CVE-2023-50249
Published
Dec 20, 2023
Updated
Aug 2, 2024
Vendor
Sentry
Product
Sentry JavaScript SDK
Classifications
CWE-400, CWE-1333, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 7.78.0, < 7.87.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sentry · Sentry JavaScript SDKversion=>= 7.78.0, < 7.87.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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