Snyk ignore works through a .snyk policy file checked into the project's root — a YAML document that lists specific vulnerability IDs to suppress, along with a required reason and an optional expiry date, so the vulnerability still shows up in Snyk's dashboard as "ignored" rather than disappearing from the scan entirely. It's a triage mechanism, not a fix, and the distinction matters for anyone relying on scan results for a compliance report.
What does a .snyk ignore file actually contain?
A .snyk file is a YAML document with an ignore key mapping vulnerability IDs (like a SNYK-JS-LODASH-... identifier) to an object specifying reason, expires, and optionally path to scope the suppression to a specific dependency path rather than every instance of that vulnerability in the tree. A typical entry looks like a vulnerability ID followed by a reason string such as "not exploitable — vendor confirmed no network-reachable path" and an ISO timestamp after which the ignore rule stops applying and the finding reappears in scan output. This structure forces a decision to be revisited rather than permanent by default, which is the point — a suppression made in good faith six months ago based on a specific code path may no longer be true after a refactor.
Why would a team ignore a finding instead of fixing it?
Teams ignore findings when the vulnerable code path isn't actually reachable, when a fix isn't yet available upstream, or when the finding is a false positive for their specific usage pattern — not as a way to make a dashboard look cleaner. A vulnerability in a test-only dependency that never ships to production, or a flaw in a code path guarded by a feature flag that's permanently off, are common legitimate cases. The risk is that ignore files accumulate as an easy way to silence noise without the underlying justification being re-verified, which is exactly why the expiry field exists — a suppression that was accurate in March may be stale by September if the dependency graph shifted underneath it.
How does this compare to how other SCA tools handle suppression?
Most SCA tools converge on the same shape: a per-project exception list with a required justification and some form of expiry or review cadence, because unmanaged suppression is a well-known way for vulnerability backlogs to look artificially small. The differentiator across tools tends to be enforcement — whether an expired or unjustified ignore actually blocks a merge or just generates a dashboard warning nobody reads. A policy that's technically present but not enforced in CI produces the same blind spot as having no policy at all, just with extra paperwork. When evaluating SCA tooling, check whether suppression records are auditable and whether expired entries actually re-surface as active findings rather than quietly staying dismissed.
What goes wrong when ignore files aren't reviewed?
Ignore files that are never reviewed turn into a growing list of unverified assumptions, and the failure mode shows up months later when an auditor or a new security hire asks why a critical CVE has been suppressed since a date nobody remembers the context for. This is a common gap in SOC 2 and similar compliance reviews — an auditor will specifically ask for the justification behind any suppressed finding, and "someone set this a year ago" is not an acceptable answer. Set a recurring review cadence (quarterly is common) where every active ignore rule gets re-validated against current reachability and current severity, and remove any that expired without a documented renewal decision.
How should teams integrate ignore policy into CI?
Integrate it by treating the ignore file as code — reviewed in pull requests like any other config change, with CI enforcing that new suppressions include both a reason and an expiry date before the pipeline passes. A suppression added without those fields, or one that's expired, should fail the build rather than silently pass, which turns the policy from a suggestion into an enforced control. Pairing this with reachability-aware scanning reduces how often teams reach for ignore rules in the first place, since findings that are genuinely unreachable get de-prioritized automatically instead of requiring a manual suppression entry for every one.
FAQ
Does an ignored vulnerability in Snyk still count toward a security score?
Typically no — once ignored, it's excluded from active vulnerability counts and dashboard scores, which is exactly why unreviewed ignore files can make a project's security posture look better than it actually is.
Can you set a global ignore policy across all repositories?
Some SCA platforms support organization-level policies that apply across projects, but per-repo .snyk files are the more common and more granular mechanism, since reachability and risk context differ project to project.
What happens when an ignored vulnerability's expiry date passes?
The suppression lapses and the finding reappears as active in the next scan, which is the intended behavior — it forces someone to make a fresh decision rather than letting an old judgment call persist indefinitely.
Is ignoring a vulnerability the same as accepting the risk permanently?
No. A well-run ignore policy treats every suppression as time-boxed and reviewable, not permanent. Permanent, unreviewed suppression is the anti-pattern that turns a triage tool into a way of hiding real risk.