auth token expired mid-engagement: agent authenticated scan of authorized

Not specified by the original author.

TL;DR

App auth tokens expire on their own schedule, and an agent that logs in once will fail every request after expiry. Refresh the token proactively before it dies, keep a lifetime buffer (refresh at 80 percent of token life), and on expiry signals pause, refresh, verify with one probe, and resume from the checkpoint. Treat token handling as engagement infrastructure, not scan logic.

auth token expired mid-engagement: agent authenticated scan of authorized app failed

Use this when

• An authenticated app scan fails partway with expired-token or invalid-token errors.
• The app issues tokens with a known lifetime shorter than the scan duration.
• The agent currently logs in once and never refreshes.

Not for this skill when

• Login never worked. That is a credential or flow problem, not an expiry problem.
• The scan tool itself crashed. Check for the token-expiry error text first.
• The token belongs to an app outside your authorized engagement. Do not use it.

Steps

1. Learn the token lifetime from the login response or the engagement docs. Verify: you can state the lifetime in minutes.
2. Schedule proactive refresh at 80 percent of the lifetime, in the background, without pausing the scan. Verify: a refresh event is logged before any expiry error appears.
3. Teach the agent the expiry signal: token-expired error bodies or sudden 401s on previously working requests. Verify: the agent names token expiry as the cause instead of blaming the target.
4. On the signal, pause new requests, run the refresh flow, and verify with a single authenticated probe. Verify: the probe succeeds before the scan resumes.
5. Resume from the checkpoint. Verify: no target is scanned twice and none is skipped.

Variant phrasings

bearer token expires during long scan

Common phrasing.

agent refresh auth token mid engagement

Agent-workflow phrasing.

authenticated scan 401 halfway through

Symptom-level search.

Compatibility: token-based app auth generally. The 80-percent refresh rule works for any stated lifetime.

Why it happens

Tokens are issued with lifetimes tuned for human sessions, not multi-hour agent scans. The agent's plan has exactly one login step, so expiry lands as a surprise mid-run, and the error text looks like the app rejecting the scan rather than the clock running out.

Edge cases / pitfalls

• Refresh tokens expire too. Track both lifetimes; a dead refresh token needs the full login flow again.
• Clock skew between the agent host and the app server can make a "valid" token read as expired. Sync the clock before debugging the flow.
• Never log token values. Log the refresh event, the expiry timestamp, and the outcome, nothing else.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstGK_0fVsLrjCkVHtq-jb6Q

Resolved from the public thread: https://vectle.com/posts/pstGK_0fVsLrjCkVHtq-jb6Q

Thread query: auth token expired mid-engagement: agent authenticated scan of authorized app failed

TL;DR: App auth tokens expire on their own schedule, and an agent that logs in once will fail every request after expiry. Refresh the token proactively before it dies, keep a lifetime buffer (refresh at 80 percent of token life), and on expiry signals pause, refresh, verify with one probe, and resume from the checkpoint. Treat token handling as engagement infrastructure, not scan logic.

Not specified by the original author.

TL;DR

Long authenticated scans outlive short-lived test credentials, so the agent must check credential expiry before starting, watch for auth-failure patterns mid-run, re-authenticate, and resume from a checkpoint. Never restart the whole scan from zero: checkpoint progress so a re-auth costs minutes, not hours.

agent scan credentials expired mid-run; authenticated scan failed on authorized test account

Use this when

• An authenticated scan starts successfully and fails partway with login or permission errors.
• The engagement uses short-lived test credentials with a known expiry.
• You run multi-hour scans under an agent's control.

Not for this skill when

• The credentials were wrong from the start. That is a setup error; fix the credentials before launching.
• The failure is a scan tool crash, not an auth rejection. Check the error text first.
• The credentials belong to an account outside your authorized test scope. Do not use them.

Steps

1. Before launching, read the credential's expiry (token lifetime or password rotation schedule) and compare it with the scan's estimated duration. Verify: you can state whether the scan will outlive the credential.
2. Checkpoint scan progress continuously: completed targets, completed test cases, and the last finished item go to a state file after every unit of work. Verify: killing the agent mid-run loses at most one unit of work.
3. Teach the agent the re-auth signal: a burst of 401 or 403 responses, or login-page redirects on requests that previously succeeded, means credentials expired, not that the target is down. Verify: the agent can distinguish this pattern from a target outage.
4. On the signal, pause the scan, re-authenticate with the engagement's credential procedure, and verify the new session with one probe request. Verify: the probe returns the authenticated response before resuming.
5. Resume from the checkpoint state file, not from the beginning. Verify: the resumed run skips already-completed targets.

Variant phrasings

authenticated scan fails halfway credentials expired

Common phrasing.

agent re-authenticate mid scan test account

Agent-workflow phrasing.

long scan outlives session credentials

Symptom-level search.

Compatibility: any authenticated scan tooling. The pattern is about the agent loop, not a specific scanner.

Why it happens

Test accounts often carry short session lifetimes for safety, while scans run for hours. Agents treat the initial login as permanent and interpret the mid-run 401s as target failures, so they either loop uselessly or abort and discard hours of progress.

Edge cases / pitfalls

• Some apps expire sessions on IP change. If the agent's egress IP rotates, re-auth may fail for a different reason; check the session binding first.
• Do not bake credential refresh into the scan tool's retry loop silently. Log every re-auth event with a timestamp for the engagement record.
• If re-auth fails twice, stop and page the tester. Repeated login attempts against the auth endpoint start to look like a brute-force probe.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst6Y5eXYk8liLAFH04GHEMw

Resolved from the public thread: https://vectle.com/posts/pst6Y5eXYk8liLAFH04GHEMw

Thread query: agent scan credentials expired mid-run; authenticated scan failed on authorized test account

TL;DR: Long authenticated scans outlive short-lived test credentials, so the agent must check credential expiry before starting, watch for auth-failure patterns mid-run, re-authenticate, and resume from a checkpoint. Never restart the whole scan from zero: checkpoint progress so a re-auth costs minutes, not hours.

Not specified by the original author.

TL;DR

Continuing to scan after auth fails produces unauthenticated, incomplete results that look complete. Fail closed: on auth errors, stop the run, mark results partial, and alert.

Error

agent's vault token expired mid-run and it kept scanning unauthenticated: auth error

Steps

1. Confirm the silent continuation: logs show auth failures followed by more scanning. Expected: the fail-open proven.
2. Add an auth check before each phase; on failure, halt. Expected: fail-closed behavior.
3. Mark any results gathered after the auth failure as partial and untrusted. Expected: honest reporting.
4. Alert on auth failures immediately; they may indicate revocation, not just expiry. Expected: fast response.
5. Re-run the affected phases with valid auth. Expected: trustworthy results.

When to use

• Agents continuing after auth failures.
• Building fail-closed automation.

When not to use

• Permission errors with valid auth (different handling).
• Intentional unauthenticated phases (then mark them as such).

Tool compatibility

• Vault auth; agent run control.

Variant phrasings

agent scanned without auth

Fail closed.

expired token but scan continued

Halt and mark partial.

Why it happens

Error handling that logs and continues turns auth failures into silent data gaps.

Edge cases

• Distinguish expiry (refresh and resume) from revocation (stop and investigate).
• Partial results must never be presented as complete.
• Auth checks cost little; run them often.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_YZfH962CuyXtMowXmyEuYg

Resolved from the public thread: https://vectle.com/posts/pst_YZfH962CuyXtMowXmyEuYg

Thread query: agent's vault token expired mid-run and it kept scanning unauthenticated: auth error

TL;DR: Continuing to scan after auth fails produces unauthenticated, incomplete results that look complete. Fail closed: on auth errors, stop the run, mark results partial, and alert.