157 lines
6.8 KiB
JSON
157 lines
6.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-63476",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-07-16T21:37:45.769Z",
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"datePublished": "2026-11-03T19:44:06.908Z",
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"dateUpdated": "2026-11-07T03:27:39.077Z"
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},
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"containers": {
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"cna": {
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"title": "isomorphic-git: Unbounded memory allocation from attacker-controlled delta target size (DoS)",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-400",
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"lang": "en",
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"description": "CWE-400: Uncontrolled Resource Consumption",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"cweId": "CWE-789",
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"lang": "en",
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"description": "CWE-789: Memory Allocation with Excessive Size Value",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "LOW",
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"baseScore": 4.3,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-9x82-4j54-863h",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-9x82-4j54-863h"
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},
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{
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"name": "https://github.com/isomorphic-git/isomorphic-git/pull/2370",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/isomorphic-git/isomorphic-git/pull/2370"
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},
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{
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"name": "https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b"
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},
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{
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"name": "https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6"
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}
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],
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"affected": [
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{
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"vendor": "isomorphic-git",
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"product": "isomorphic-git",
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"versions": [
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{
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"version": "< 1.38.6",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-11-03T19:44:06.908Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git reads a server-controlled targetSize while applying a packfile delta in src/utils/applyDelta.js and passes it without a bound to Buffer.alloc(targetSize). A malicious or man-in-the-middle-controlled remote can send one delta header that causes git.clone() or git.fetch() to allocate approximately 2 GB before validating the actual delta output. GitPackIndex.fromPack swallows the later size-mismatch error, so a host with sufficient memory may retain the resource waste without a visible failure, while containers, serverless functions, and small virtual machines may terminate. Node.js heap limits do not mitigate the off-heap Buffer allocation. This issue is fixed in version 1.38.6."
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}
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],
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"source": {
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"advisory": "GHSA-9x82-4j54-863h",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-9x82-4j54-863h",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-11-07T03:27:18.874587Z",
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"id": "CVE-2026-63476",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-07T03:27:39.077Z"
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}
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}
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]
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}
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} |