CVE Explorer

CVE-2026-58486

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load (js-yaml v3) via @hedgedoc/meta-marked, which resolved YAML anchor aliases. A compact malicious payload could therefore expand into a huge object structure, consuming excessive CPU. This expansion ran on every request to the publish view (/s/<shortid>)

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f656dc0c330cfc644ba18e3bb60e52e694d92200acee567bd93cd537e153ac67

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-409","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"hedgedoc","vendor":"hedgedoc","versions":[{"status":"affected","version":"< 1.11.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.3,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-409","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/hedgedoc/hedgedoc/commit/c489497e451887bfe400434c5a010940051e9890","tags":["x_refsource_MISC"],"url":"https://github.com/hedgedoc/hedgedoc/commit/c489497e451887bfe400434c5a010940051e9890"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /containers/cna/references/1

{"name":"https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-qj78-mjch-wwrv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-qj78-mjch-wwrv"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cc35a08d1a812afd2b37d0f67a844cb31285663e57c36f500de9ac59554e9fb9 · sha256:808d640fdc2f88f8… · /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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