CVE-2026-20779

Estado: AplazadaAlta (7.1)—

Gitea versions from 1.5.0 before 1.26.3 have a TOTP single-use enforcement defect that allows a valid TOTP code to be accepted more than once across web two-factor authentication flows and the Basic Auth X-Gitea-OTP path.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.48%
Percentil entre todas las CVEs puntuadas: 39
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1078 Valid Accountsstealth · persistence · privilege escalation · initial access80 %
Impacto secundarioT1556 Modify Authentication Processdefense impairment · persistence · credential access70 %

UI:R + web application requiere interacción del usuario (introducir código TOTP). El defecto permite reutilizar un código válido, logrando autenticación no autorizada (T1078) y potencial control de cuentas (T1556).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

User Account Management Privileged Account Management Password Policies Multi-factor Authentication Application Developer Guidance Active Directory Configuration

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Gitea — Gitea^AI

CWE

CWE-294

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-20779",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-20779",
          "role": "CISA Coordinator",
          "options": [
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            {
              "automatable": "no"
            },
            {
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          "version": "2.0.3",
          "timestamp": "2026-07-06T19:02:05.918693Z"
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          "integrityImpact": "LOW",
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          "privilegesRequired": "NONE",
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          "product": "Gitea Open Source Git Server",
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  "published": "2026-07-03T21:16:56.543",
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      "url": "https://blog.gitea.com/release-of-1.26.3-and-1.26.4/",
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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      "value": "Gitea versions from 1.5.0 before 1.26.3 have a TOTP single-use enforcement defect that allows a valid TOTP code to be accepted more than once across web two-factor authentication flows and the Basic Auth X-Gitea-OTP path."
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  "lastModified": "2026-07-07T18:16:35.270",
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