Vulnerabilities in pkg:golang/github.com/open-feature/flagd/flagd-proxy

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4c5f-9mj4-m247",
  "modified" : "2026-01-05T15:07:46Z",
  "published" : "2026-01-05T15:07:05Z",
  "aliases" : [ ],
  "summary" : "flagd: Multiple Go Runtime CVEs Impact Security and Availability",
  "details" : "### Summary\nIn 2025, several vulnerabilities in the Go Standard Library were disclosed, impacting Go-based applications like flagd (the evaluation engine for OpenFeature). These CVEs primarily focus on Denial of Service (DoS) through resource exhaustion and Race Conditions in database handling. \n\n| CVE ID | Impacted Package | Severity | Description & Impact on flagd |\n| -- | -- | -- | -- |\n| CVE-2025-47907 | database/sql | 7.0 (High) | Race Condition:  Canceling a query during a Scan call can return data from the wrong query. Critical if flagd uses SQL-based sync providers (e.g., Postgres), potentially leading to incorrect flag configurations. |\n| CVE-2025-61725 | net/mail | 7.5 (High) | DoS: Inefficient complexity in ParseAddress.  Attackers can provide crafted email strings with large domain literals to exhaust CPU if flagd parses email-formatted metadata. |\n| CVE-2025-61723 | encoding/pem | 7.5 (High) | DoS: Quadratic complexity when parsing invalid PEM inputs. Relevant if flagd loads TLS certificates or keys via PEM files from untrusted sources. |\n| CVE-2025-61729 | crypto/x509 | 7.5 (High) | Resource Exhaustion: HostnameError.Error() lacks string concatenation limits. A malicious TLS certificate with thousands of hostnames could crash flagd during connection handshakes. |\n| CVE-2025-58188 | net/http | Medium | Request Smuggling: Improper header handling in HTTP/1.1. Could allow attackers to bypass security filters positioned in front of flagd sync or evaluation APIs. |\n| CVE-2025-58187 | archive/zip | Medium | DoS:  Improper validation of malformed ZIP archives.  Impacts flagd if configured to fetch and unpack zipped configuration bundles from remote providers. |",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/open-feature/flagd/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/open-feature/flagd/flagd-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.8.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/open-feature/flagd/flagd"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/open-feature/flagd/security/advisories/GHSA-4c5f-9mj4-m247"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open-feature/flagd/pull/1840"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/open-feature/flagd"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open-feature/flagd/releases/tag/core%2Fv0.13.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-362", "CWE-400", "CWE-407", "CWE-444", "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-05T15:07:05Z",
    "nvd_published_at" : null
  }
}