{"id":"GHSA-4c5f-9mj4-m247","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. |","aliases":["GO-2026-4279"],"modified":"2026-02-03T03:14:08.499876Z","published":"2026-01-05T15:07:05Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-01-05T15:07:05Z","nvd_published_at":null,"cwe_ids":["CWE-20","CWE-362","CWE-400","CWE-407","CWE-444","CWE-770"],"severity":"HIGH"},"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"}],"affected":[{"package":{"name":"github.com/open-feature/flagd/core","ecosystem":"Go","purl":"pkg:golang/github.com/open-feature/flagd/core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4c5f-9mj4-m247/GHSA-4c5f-9mj4-m247.json"}},{"package":{"name":"github.com/open-feature/flagd/flagd-proxy","ecosystem":"Go","purl":"pkg:golang/github.com/open-feature/flagd/flagd-proxy"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4c5f-9mj4-m247/GHSA-4c5f-9mj4-m247.json"}},{"package":{"name":"github.com/open-feature/flagd/flagd","ecosystem":"Go","purl":"pkg:golang/github.com/open-feature/flagd/flagd"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4c5f-9mj4-m247/GHSA-4c5f-9mj4-m247.json"}}],"schema_version":"1.9.0"}