CVE Explorer

CVE-2026-47734

Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.1.0 and prior to version 1.2.5, a client with push access could push a tiny crafted thin pack (~174 bytes) whose delta header declares a huge dest_size. When dulwich ingested it via add_thin_pack / apply_delta, it would allocate hundreds of MB of memory based on that attacker-controlled size, with no relationship to the actual bytes received. Operators running a Dulwich-based Git server that

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:320be7c5c77e4b6af7b539cccb3793f03cf378935cee23c39e93e5a582132669

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:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"dulwich","vendor":"jelmer","versions":[{"status":"affected","version":">= 0.1.0, < 1.2.5"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/metrics/0/cvssV3_1

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:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5","tags":["x_refsource_MISC"],"url":"https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /containers/cna/references/1

{"name":"https://github.com/jelmer/dulwich/security/advisories/GHSA-xrvj-v92f-53gj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jelmer/dulwich/security/advisories/GHSA-xrvj-v92f-53gj"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:753feef7218d4647fe4f38d62888f6bff1a27b1801237b3894b2189fdd955f99 · sha256:2546ef7145b1885f… · /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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