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CVE-2026-49958

Hermes WebUI before version 0.51.303 contains a time-of-check time-of-use (TOCTOU) race condition vulnerability in the git_discard function within api/workspace_git.py that allows attackers to delete files outside the configured workspace boundary by replacing a validated path component with a symlink after validation but before deletion. Attackers can substitute a workspace-controlled path component with a symlink pointing to an external directory between the safe_resolve_ws() validation step a
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e9f89ae8f343f5c144d1999441a63356046e8d1d72194bfa2df159f0f92321a7
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":4.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/nesquena/hermes-webui","product":"hermes-webui","repo":"https://github.com/nesquena/hermes-webui","vendor":"nesquena","versions":[{"lessThan":"0.51.303","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":4.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-367","description":"Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"tags":["patch"],"url":"https://github.com/nesquena/hermes-webui/commit/4580f584964d640b95c4ffc9245a21ab926bec73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/references/3
{"tags":["issue-tracking"],"url":"https://github.com/nesquena/hermes-webui/pull/3702"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/nesquena/hermes-webui/pull/3702"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/adp/0/references/0
{"tags":["issue-tracking"],"url":"https://github.com/nesquena/hermes-webui/pull/3756"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/references/2
{"tags":["release-notes"],"url":"https://github.com/nesquena/hermes-webui/releases/tag/v0.51.303"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/hermes-webui-toctou-race-condition-via-git-discard"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:41cbfa09a4b67f42b4adc35b1af7815c3f58fcb9594a0566d56ce17f2fe66d7d · sha256:6a11e1c4703bc61d… · /containers/cna/references/4

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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