What is CVE-2026-23603?

CVE-2026-23603 is a low-severity vulnerability in Gitea Open Source Git Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.1/10. Published 2026-08-13.

How severe is CVE-2026-23603?

Low severity. CVSS v3 base score is 3.1 out of 10.

SSRF in Gitea Open Source Git Server

CVE-2026-23603

Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-08-13 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (19.3th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Gitea Open Source Git Server — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

88ee5874-cf24-4952-aea0-31affedb7ff2 (vendor-advisory)
88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)

Frequently asked questions

What is CVE-2026-23603?: CVE-2026-23603 is a low-severity vulnerability in Gitea Open Source Git Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.1/10. Published 2026-08-13.
How severe is CVE-2026-23603?: Low severity. CVSS v3 base score is 3.1 out of 10.