CVE-2023-36829Network attack vector

Cross-origin API access via suffix-only origin comparison

Published Jul 6, 2023 · Updated Nov 6, 2024

CORS misconfiguration in Sentry 23.6.0 through 23.6.1 allows remote attackers to read or write API data through a victim's browser. The API CORS wrapper uses a bare string-suffix comparison between the Origin header and system.base-hostname, so an attacker-controlled hostname ending in the configured value receives credential permission. Exploitation requires an explicit, nondefault base-hostname setting and user interaction in a browser that sends cross-site cookies.

CVSS severity6.8
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS misconfiguration in Sentry 23.6.0 through 23.6.1 allows remote attackers to read or write API data through a victim's browser. The API CORS wrapper uses a bare string-suffix comparison between the Origin header and system.base-hostname, so an attacker-controlled hostname ending in the configured value receives credential permission. Exploitation requires an explicit, nondefault base-hostname setting and user interaction in a browser that sends cross-site cookies.

The record

CVE
CVE-2023-36829
Published
Jul 6, 2023
Updated
Nov 6, 2024
Vendor
Sentry
Product
Sentry
Classifications
CWE-863, CWE-697, CWE-942, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=>= 23.6.0, < 23.6.2
  2. Affected versionversion=23.6.0 <23.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sentry · Sentryversion=>= 23.6.0, < 23.6.2; version=23.6.0 <23.6.2

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

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-863Incorrect Authorization
CWE-697Incorrect Comparison
CWE-942Permissive Cross-domain Security Policy with Untrusted Domains
T1190Exploit Public-Facing Application

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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