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CVE-2026-1355

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration identifier, an attacker could overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:75109479209fdd2645e99732585c4b598750c9a0966ff972f93a74b89aae2995
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"Enterprise Server","vendor":"GitHub","versions":[{"changes":[{"at":"3.19.2","status":"unaffected"}],"lessThanOrEqual":"3.19.1","status":"affected","version":"3.19.0","versionType":"semver"},{"changes":[{"at":"3.18.5","status":"unaffected"}],"lessThanOrEqual":"3.18.4","status":"affected","version":"3.18.0","versionType":"semver"},{"changes":[{"at":"3.17.11","status":"unaffected"}],"lessThanOrEqual":"3.17.10","status":"affected","version":"3.17.0","versionType":"semver"},{"changes":[{"at":"3.16.14","status":"unaffected"}],"lessThanOrEqual":"3.16.13","status…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:L","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862 Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"url":"https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.23"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/references/5
{"url":"https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.18"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/references/4
{"url":"https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.14"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/references/3
{"url":"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.11"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/references/2
{"url":"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /containers/cna/references/1
{"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d660f01d26c0c76b809f0f3e43026f0a4248beb48ab1597cbc08775f3adbc6e · sha256:45bfea5d4ebfea20… · /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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