CVE Explorer

CVE-2026-31248

Docling's METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of servi

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bf10153d54258cde587ee4e75cc60e2db5f7d21b73e4e37f0bd7c361a0165ced

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-776","description":"CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/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:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-776","description":"CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"url":"https://github.com/docling-project/docling"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/cna/references/0

{"url":"https://www.notion.so/CVE-2026-31248-35d1e1393188818585b2ce3b9ce24686"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:72688f90ad7c055e496baea43add9fba3ade92c114cda4113a748f6c3b74a9cb · sha256:eb9181265dcb82ff… · /containers/cna/references/1

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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