CVE-2026-34966: Gitea prior to 1.27.0 contains a server-side request forgery vulnerability that allows authenticated attackers to bypass SSRF protections by exploiting HTTP fetch operations in mig

highCVSS 7.6CVE-2026-34966

Gitea prior to 1.27.0 contains a server-side request forgery vulnerability that allows authenticated attackers to bypass SSRF protections by exploiting HTTP fetch operations in migration and OAuth avatar code paths that use Go's default http.Get without a custom DialContext. Attackers can supply arbitrary URLs through release asset download URLs, pull-request patch URLs, or OAuth avatar endpoints to reach internal services, cloud instance-metadata endpoints, or read local files such as the application configuration containing database credentials and signing secrets, with exfiltrated content persisted as migration release assets for later retrieval.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.6
Published: 2026-08-05
Last updated: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-34966

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-349660.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-34966	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Gitea: Multiple Vulnerabilities Enable Information Disclosurecert-bund

Recent advisories for Gitea

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] Gitea: Multiple Vulnerabilities Enable Information Disclosurecert-bund · 2026-08-06
high[NEW] [high] Gitea: Vulnerability enables information disclosure and code executioncert-bund · 2026-08-03
high[NEW] [high] Gitea: Vulnerability allows code executioncert-bund · 2026-07-29
highGHSA-gx3v-q759-g323: Gitea: TOTP TOCTOU race on web 2FA paths + missing replay check on Basic-Auth `X-Gitea-OT…ghsa · 2026-07-21
mediumGHSA-fq2p-5p22-8g6j: Gitea: Public-Only Personal access tokens scope bypass in Organization and Permission End…ghsa · 2026-07-21
mediumGHSA-2wm4-vwp6-v7xc: Gitea: SSRF via Migration Asset Downloads Bypasses hostmatcher — Reads Internal Files and…ghsa · 2026-07-21