{"id":"GHSA-4c5f-9mj4-m247","aliases":["GO-2026-4279"],"status":"published","title":"flagd: Multiple Go Runtime CVEs Impact Security and Availability","description":"### 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 \u0026 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. |","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-362","CWE-400","CWE-407","CWE-444","CWE-770"],"published":"2026-01-05T15:07:05Z","modified":"2026-03-03T04:57:50Z","fixes":[{"ecosystem":"Go","package":"github.com/open-feature/flagd/core","fixed_in":["0.13.1"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/open-feature/flagd/flagd-proxy","fixed_in":["0.8.2"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/open-feature/flagd/flagd","fixed_in":["0.13.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/open-feature/flagd/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/core","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd-proxy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/core","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/open-feature/flagd/flagd-proxy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.2"}]}]}],"references":[{"url":"https://github.com/open-feature/flagd/security/advisories/GHSA-4c5f-9mj4-m247","tags":["web","advisory"]},{"url":"https://github.com/open-feature/flagd/pull/1840","tags":["web"]},{"url":"https://github.com/open-feature/flagd/releases/tag/core%2Fv0.13.1","tags":["web"]},{"url":"https://github.com/advisories/GHSA-4c5f-9mj4-m247"},{"url":"https://github.com/open-feature/flagd","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-4c5f-9mj4-m247","title":"flagd: Multiple Go Runtime CVEs Impact Security and Availability","description":"### 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 \u0026 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. |","status":"published","published":"2026-01-05T15:07:05Z","modified":"2026-01-05T15:07:47Z","cwes":["CWE-20","CWE-362","CWE-400","CWE-407","CWE-444","CWE-770"],"updated_at":"2026-11-02T14:39:15.106458Z"}],"osv":[{"id":"GHSA-4c5f-9mj4-m247","title":"flagd: Multiple Go Runtime CVEs Impact Security and Availability","description":"### 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 \u0026 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. |","status":"published","published":"2026-01-05T15:07:05Z","modified":"2026-02-03T03:14:08.499876Z","cwes":["CWE-20","CWE-362","CWE-400","CWE-407","CWE-444","CWE-770"],"updated_at":"2026-11-02T15:46:36.782754Z"},{"id":"GO-2026-4279","title":"flagd: Multiple Go Runtime CVEs Impact Security and Availability in github.com/open-feature/flagd/core","description":"flagd: Multiple Go Runtime CVEs Impact Security and Availability in github.com/open-feature/flagd/core","status":"published","published":"2026-01-12T17:39:39Z","modified":"2026-03-03T04:57:50.42947Z","updated_at":"2026-11-02T15:47:02.011123Z"}]}}