Security readout for executives and security teams
Plain-English summary
CVE-2023-36829 is a Sentry CORS flaw that can make affected APIs trust certain cross-origin requests too broadly. It affects Sentry 23.6.0 through before 23.6.2 only when system.base-hostname was explicitly configured. The vendor released a patch in 23.6.2. No provided source reports active exploitation.
Executive priority
Treat this as a bounded but real security update. It is not presented as actively exploited, but affected Sentry instances may expose sensitive operational data or integrity risk in multi-step scenarios. Upgrade affected deployments during the next security maintenance window.
Technical view
Affected Sentry versions may return access-control-allow-credentials: true when an Origin header ends with the configured system.base-hostname. The issue maps to improper authorization and permissive cross-domain policy weaknesses. CVSS is 6.8, with high confidentiality and integrity impact, but attack complexity is high and user interaction is required.
Likely exposure
Exposure is likely limited to Sentry installations on versions 23.6.0 or 23.6.1 with system.base-hostname explicitly set. Installations using the default empty value are described as unaffected. Recent major browser cross-site cookie blocking also limits practical impact.
Exploitation context
The bundle does not include evidence of active exploitation, and KEV status is false. The advisory notes impact is limited by modern browser cookie behavior, but the flaw could support multi-step attacks where credentialed cross-origin access becomes useful.
Researcher notes
Focus validation on the narrow version and configuration gate. Do not assume all Sentry deployments are affected. The key behavior is credentialed CORS being allowed for Origins matching the suffix condition against system.base-hostname. Browser cookie controls reduce but do not eliminate risk.
Mitigation direction
- Upgrade Sentry to version 23.6.2 or later.
- Prioritize deployments with system.base-hostname explicitly configured.
- Review vendor advisory and release notes before changing production configuration.
- Check Sentry guidance if immediate upgrade is not possible.
Validation and detection
- Inventory Sentry deployment versions and identify any 23.6.0 or 23.6.1 instances.
- Review configuration for an explicitly set system.base-hostname value.
- Confirm upgraded deployments are running 23.6.2 or later.
- Review access logs for unusual cross-origin API access patterns.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-942: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-36829 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N1.65.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/getsentry/sentry/security/advisories/GHSA-4xqm-4p72-87h6CVE reference · x_refsource_CONFIRM
- https://github.com/getsentry/sentry/pull/52276CVE reference · x_refsource_MISC
- https://github.com/getsentry/sentry/commit/ee44c6be35e5e464bc40637580f39867898acd8bCVE reference · x_refsource_MISC
- https://github.com/getsentry/self-hosted/releases/tag/23.6.2CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Permissive Cross-domain Security Policy with Untrusted Domains
Permissive Cross-domain Security Policy with Untrusted Domains represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.