CVE Explorer
CVE-2026-28807
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in gleam-wisp wisp allows arbitrary file read via percent-encoded path traversal.
The wisp.serve_static function is vulnerable to path traversal because sanitization runs before percent-decoding. The encoded sequence %2e%2e passes through string.replace unchanged, then uri.percent_decode converts it to .., which the OS resolves as directory traversal when the file is read.
An unauthenticated attacker c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
affected · 2 assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","packageName":"gleam-wisp/wisp","packageURL":"pkg:github/gleam-wisp/wisp","product":"wisp","repo":"https://github.com/gleam-wisp/wisp.git","vendor":"gleam-wisp","versions":[{"lessThan":"161118c431047f7ef1ff7cabfcc38981877fdd93","status":"affected","version":"129dcb1fe10ab1e676145d91477535e1c90ab550","versionType":"git"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","packageName":"wisp","packageURL":"pkg:hex/wisp","product":"wisp","repo":"https://github.com/gleam-wisp/wisp","vendor":"gleam-wisp","versions":[{"lessThan":"2.2.1","status":"affected","version":"2.1.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/affected/0
Affected products and versions
2 source assertions{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","packageName":"gleam-wisp/wisp","packageURL":"pkg:github/gleam-wisp/wisp","product":"wisp","repo":"https://github.com/gleam-wisp/wisp.git","vendor":"gleam-wisp","versions":[{"lessThan":"161118c431047f7ef1ff7cabfcc38981877fdd93","status":"affected","version":"129dcb1fe10ab1e676145d91477535e1c90ab550","versionType":"git"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","packageName":"wisp","packageURL":"pkg:hex/wisp","product":"wisp","repo":"https://github.com/gleam-wisp/wisp","vendor":"gleam-wisp","versions":[{"lessThan":"2.2.1","status":"affected","version":"2.1.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-28807.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/gleam-wisp/wisp/commit/161118c431047f7ef1ff7cabfcc38981877fdd93"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/gleam-wisp/wisp/security/advisories/GHSA-h7cj-j2vv-qw8r"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-28807"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80772e173796afaf86e1565ee699912c33fae4938b05c9f3e5ae464f19ab6717 · sha256:1689e571bb5230a3… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.