Vulnerability in payload (CVE-2026-105863)
Summary
Vulnerability in payload (CVE-2026-105863). Confidential information can be exposed externally. Mitigation: upgrade to 4.0.0-canary.34 or later.
Original description
The description as published by the source.
Impact
Under certain field configurations, Payload could include unintended values in the authentication token issued at login.
You are affected if:
- You use an affected Payload version and have configured a custom field option that maps a field to a reserved authentication claim name.
Patches
Payload now restricts which field configuration options can influence the contents of the authentication token.
Users should upgrade payload packages to >= 3.90.0 or >= 4.0.0-canary.34.
Workarounds
There is no complete workaround. Users should upgrade payload packages to >= 3.90.0 or >= 4.0.0-canary.34.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-105863 has been found in payload.
Confidential information can be exposed externally. CVSS score: 9.4/10.
What to do: upgrade payload to 4.0.0-canary.34 or later.
If unsure, ask your IT team or search "payload CVE-2026-105863" on the vendor's site.
CVE-2026-105863 (payload) — CWE-290 / CVSS v3 9.4
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 4.0.0-canary.34 — apply immediately
Workaround: There is no complete workaround.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-290) exists in payload.
Check the vendor advisory for the affected versions of payload.
Severity: Critical (CVSS 9.4/10). Confidential information can be exposed externally.
Update to 4.0.0-canary.34.
Workaround: There is no complete workaround.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'payload' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'payload' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
payloadを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
There is no complete workaround.パッチが適用されるまでの応急処置として、There is no complete workaround. を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade payload to 4.0.0-canary.34ステージング環境で 4.0.0-canary.34 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com