CVE-2026-27197 json
Sentry: Improper Authentication on SAML SSO process allows user identity linking
published 2026-02-21 8 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-7736 , GHSA-ggmg-cqg6-j45g , PYSEC-2026-533
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
Sentry is a developer-first error tracking and performance monitoring tool. Versions 21.12.0 through 26.1.0 have a critical vulnerability in its SAML SSO implementation which allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. Self-hosted users are only at risk if the following criteria is met: ore than one organizations are configured (SENTRY_SINGLE_ORGANIZATION = True), or malicious user has existing access and permissions to modify SSO settings for another organization in a multo-organization instance. This issue has been fixed in version 26.2.0. To workaround this issue, implement user account-based two-factor authentication to prevent an attacker from being able to complete authentication with a victim's user account. Organization administrators cannot do this on a user's behalf, this requires individual users to ensure 2FA has been enabled for their account.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| OSV | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | sentry | >=21.12.0 >=21.12.0, <26.2.0 |
26.2.0 |
Affected products
- getsentry sentry
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/getsentry/sentry/pull/108458
web
-
github.com
/getsentry/sentry/security/advisories/GHSA-ggmg-cqg6-j45g
web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-27197
advisory
-
github.com
/getsentry/sentry
package
-
pypi.org
/project/sentry
package
-
github.com
/advisories/GHSA-ggmg-cqg6-j45g
advisory
Sources
- CVE List CVE-2026-27197
- GitHub Advisory GHSA-ggmg-cqg6-j45g
- NVD CVE-2026-27197
- OSV PYSEC-2026-533
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.