What’s Vulnerable › Vulnerabilities

CVE-2026-23603: Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-08-26
• Weakness: CWE-918

Description

Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

Affected products

• Gitea Open Source Git Server: through 1.26.4

References

• https://blog.gitea.com/gitea-1.27.0-is-released/
• https://github.com/go-gitea/gitea/releases/tag/v1.27.0
• https://github.com/go-gitea/gitea/security/advisories/GHSA-x77v-q46j-393g
• https://github.com/go-gitea/gitea/security/advisories/GHSA-x77v-q46j-393g

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