CVE Explorer

CVE-2026-22036

Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bc7e8b12f70e5e34c92bc9826ba179e9cec945c36ca6aa6571548efbdc378f3b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"undici","vendor":"nodejs","versions":[{"status":"affected","version":"< 6.23.0"},{"status":"affected","version":">= 7.0.0, < 7.18.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:15933cd91efeb160006552c9fdbb5b75d2e15a7754bea0eee4f19bceea7f8eb8 · sha256:d797b60e4e1478ed… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:15933cd91efeb160006552c9fdbb5b75d2e15a7754bea0eee4f19bceea7f8eb8 · sha256:d797b60e4e1478ed… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:15933cd91efeb160006552c9fdbb5b75d2e15a7754bea0eee4f19bceea7f8eb8 · sha256:d797b60e4e1478ed… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3","tags":["x_refsource_MISC"],"url":"https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:15933cd91efeb160006552c9fdbb5b75d2e15a7754bea0eee4f19bceea7f8eb8 · sha256:d797b60e4e1478ed… · /containers/cna/references/1

{"name":"https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:15933cd91efeb160006552c9fdbb5b75d2e15a7754bea0eee4f19bceea7f8eb8 · sha256:d797b60e4e1478ed… · /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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