CVE-2026-26232

Status: DeferredCritical (9.1)—

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base score: 9.1

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.50%
Percentile among all scored CVEs: 40
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access95 %
Primary impactT1078 Valid Accountsstealth · persistence · privilege escalation · initial access90 %
Secondary impactT1098 Account Manipulationpersistence · privilege escalation85 %

OAuth2 bypass sin autenticación previa (AV:N, PR:N, UI:N) permite obtener tokens válidos (T1078) e impersonar usuarios (T1098) en Gitea. CWE-294 (autenticación deficiente).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management User Account Management Network Segmentation Multi-factor Authentication Application Developer Guidance Active Directory Configuration

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Gitea — Gitea^AI

CWEs

CWE-294

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-26232",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-26232",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-07T16:20:50.306165Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "affectedData": [
        {
          "vendor": "Gitea",
          "product": "Gitea Open Source Git Server",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.25.5",
              "versionType": "semver"
            }
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  "published": "2026-07-03T21:16:58.313",
  "references": [
    {
      "url": "https://blog.gitea.com/release-of-1.25.5/",
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
    },
    {
      "url": "https://github.com/go-gitea/gitea/pull/36797",
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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      "url": "https://github.com/go-gitea/gitea/pull/36851",
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      "url": "https://github.com/go-gitea/gitea/releases/tag/v1.25.5",
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "description": [
        {
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  "descriptions": [
    {
      "lang": "en",
      "value": "Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange."
    }
  ],
  "lastModified": "2026-07-07T18:16:37.180",
  "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2"
}