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CVE-2026-49138

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the automatic HTTP redirect following behavior in the httpx library to bypass initial URL validation and cause the runtime to send outbound requests to internal hosts before final resolved URL validation is
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a7da26fc68fea44fd2c36334ab32afe5f643137d9b2dbe72ea96b5bdb9ae9edb
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":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/HKUDS/nanobot","product":"nanobot","repo":"https://github.com/HKUDS/nanobot","vendor":"HKUDS","versions":[{"lessThan":"0.2.1","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["patch"],"url":"https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/references/2
{"tags":["issue-tracking"],"url":"https://github.com/HKUDS/nanobot/pull/3928"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/HKUDS/nanobot/pull/3928"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/adp/0/references/0
{"tags":["release-notes"],"url":"https://github.com/HKUDS/nanobot/releases/tag/v0.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5fedef1511091f7ebf478f7634738139f8a540c2461c7e004e6c51ad252cae0a · sha256:ecb2c32c31a13c7b… · /containers/cna/references/3

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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