CVE Explorer

CVE-2026-43982

Algernon is a small self-contained pure-Go web server. Prior to 1.17.6, uploadedFileSaveIn() in lua/upload/upload.go uses filepath.Join() with the caller-supplied directory but performs no boundary check after joining. A directory of ../../../tmp resolves cleanly to /tmp, outside the web root. This vulnerability is fixed in 1.17.6.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5a17229b28831215d54c7d73819a8fc4ea53c309327497066543422852c1431c

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"algernon","vendor":"xyproto","versions":[{"status":"affected","version":"< 1.17.6"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:68aa18c52539fe7a215759fee636cb3660303336b8a9a085673c7c3702e5aa6d · sha256:251ac7f41935a839… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:68aa18c52539fe7a215759fee636cb3660303336b8a9a085673c7c3702e5aa6d · sha256:251ac7f41935a839… · /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_v5cwe
urn:baitaphish:normalized-source-record:v2:68aa18c52539fe7a215759fee636cb3660303336b8a9a085673c7c3702e5aa6d · sha256:251ac7f41935a839… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/xyproto/algernon/issues/172","tags":["x_refsource_MISC"],"url":"https://github.com/xyproto/algernon/issues/172"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:68aa18c52539fe7a215759fee636cb3660303336b8a9a085673c7c3702e5aa6d · sha256:251ac7f41935a839… · /containers/cna/references/1

{"name":"https://github.com/xyproto/algernon/security/advisories/GHSA-2j2c-pv62-mmcp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/xyproto/algernon/security/advisories/GHSA-2j2c-pv62-mmcp"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:68aa18c52539fe7a215759fee636cb3660303336b8a9a085673c7c3702e5aa6d · sha256:251ac7f41935a839… · /containers/cna/references/0

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.

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