CVE-2026-24001

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Prior to versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1, attempting to parse a patch whose filename headers contain the line break characters `\\r`, `\\u2028`, or `\\u2029` can cause the `parsePatch` method to enter an infinite loop. It then consumes memory without limit until the process crashes due to running out of memory. Applications are therefore likely to be vulnerable to a denial-of-service attack if they call `parsePatch` with a user-provided patch as input. A large payload is not needed to trigger the vulnerability, so size limits on user input do not provide any protection. Furthermore, some applications may be vulnerable even when calling `parsePatch` on a patch generated by the application itself if the user is nonetheless able to control the filename headers (e.g. by directly providing the filenames of the files to be diffed). The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its \"leading garbage\"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*\u00b3) time to parse. Versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\\r`, `\\u2028`, or `\\u2029`."}], "source": {"advisory": "GHSA-73rr-hh4g-fpgx", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-22T12:57:00.484983Z", "id": "CVE-2026-24001", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-03T16:03:16.859Z"}}, {"affected": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:satellite:6"], "defaultStatus": "affected", "packageName": "nodejs-diff", "product": "Red Hat Satellite 6", "vendor": "Red Hat"}], "datePublic": "2026-01-22T02:23:44.059Z", "descriptions": [{"lang": "en", "value": "A flaw was found in jsdiff. 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The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its \"leading garbage\"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*\u00b3) time to parse. Versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1 contain a fix. 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Prior to versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1, attempting to parse a patch whose filename headers contain the line break characters `\\r`, `\\u2028`, or `\\u2029` can cause the `parsePatch` method to enter an infinite loop. It then consumes memory without limit until the process crashes due to running out of memory. Applications are therefore likely to be vulnerable to a denial-of-service attack if they call `parsePatch` with a user-provided patch as input. A large payload is not needed to trigger the vulnerability, so size limits on user input do not provide any protection. Furthermore, some applications may be vulnerable even when calling `parsePatch` on a patch generated by the application itself if the user is nonetheless able to control the filename headers (e.g. by directly providing the filenames of the files to be diffed). The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its \"leading garbage\"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*\u00b3) time to parse. Versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\\r`, `\\u2028`, or `\\u2029`."}, {"lang": "es", "value": "jsdiff es una implementaci\u00f3n de diferenciaci\u00f3n de texto en JavaScript. Antes de las versiones 8.0.3, 5.2.2, 4.0.4 y 3.5.1, intentar analizar un parche cuyos encabezados de nombre de archivo contienen los caracteres de salto de l\u00ednea `\\r`, `\\u2028` o `\\u2029` puede hacer que el m\u00e9todo `parsePatch` entre en un bucle infinito. Luego consume memoria sin l\u00edmite hasta que el proceso falla por falta de memoria. Por lo tanto, las aplicaciones son propensas a ser vulnerables a un ataque de denegaci\u00f3n de servicio si llaman a `parsePatch` con un parche proporcionado por el usuario como entrada. No se necesita una carga \u00fatil grande para activar la vulnerabilidad, por lo que los l\u00edmites de tama\u00f1o en la entrada del usuario no proporcionan ninguna protecci\u00f3n. Adem\u00e1s, algunas aplicaciones pueden ser vulnerables incluso al llamar a `parsePatch` en un parche generado por la propia aplicaci\u00f3n si el usuario, no obstante, puede controlar los encabezados de nombre de archivo (por ejemplo, proporcionando directamente los nombres de archivo de los archivos a diferenciar). El m\u00e9todo `applyPatch` se ve afectado de manera similar si (y solo si) se llama con una representaci\u00f3n de cadena de un parche como argumento, ya que internamente analiza esa cadena usando `parsePatch`. Otros m\u00e9todos de la librer\u00eda no se ven afectados. Finalmente, un segundo error menos interdependiente - un ReDOS - tambi\u00e9n se manifiesta cuando esos mismos caracteres de salto de l\u00ednea est\u00e1n presentes en el encabezado *patch* de un parche (tambi\u00e9n conocido como su 'leading garbage'). Un encabezado de parche maliciosamente elaborado de longitud *n* puede tomarle a `parsePatch` un tiempo de O(*n*\u00b3) para analizar. Las versiones 8.0.3, 5.2.2, 4.0.4 y 3.5.1 contienen una correcci\u00f3n. Como soluci\u00f3n alternativa, no intente analizar parches que contengan ninguno de estos caracteres: `\\r`, `\\u2028` o `\\u2029`."}], "id": "CVE-2026-24001", "lastModified": "2026-07-15T02:18:46.763", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.7, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24001", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-22T12:57:00.484983Z", "version": "2.0.3"}}]}, "published": "2026-01-22T03:15:47.627", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/kpdecker/jsdiff/issues/653"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/kpdecker/jsdiff/pull/649"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-24001"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2431930"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24001.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-1333"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "jsdiff: denial of service vulnerability in parsePatch and applyPatch", "id": "2431930", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2431930"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["jsdiff is a JavaScript text differencing implementation. Prior to versions 8.0.3, 5.2.2, and 4.0.4, attempting to parse a patch whose filename headers contain the line break characters `\\r`, `\\u2028`, or `\\u2029` can cause the `parsePatch` method to enter an infinite loop. It then consumes memory without limit until the process crashes due to running out of memory. Applications are therefore likely to be vulnerable to a denial-of-service attack if they call `parsePatch` with a user-provided patch as input. A large payload is not needed to trigger the vulnerability, so size limits on user input do not provide any protection. Furthermore, some applications may be vulnerable even when calling `parsePatch` on a patch generated by the application itself if the user is nonetheless able to control the filename headers (e.g. by directly providing the filenames of the files to be diffed). The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its \"leading garbage\"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*\u00b3) time to parse. Versions 8.0.3, 5.2.2, and 4.0.4 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\\r`, `\\u2028`, or `\\u2029`.", "A flaw was found in jsdiff. A specially crafted patch input containing specific line break characters can cause the parsePatch method to enter an infinite loop, leading to uncontrolled memory consumption and a process crash, resulting in a denial of service. The applyPatch method is similarly affected when called with a string representation of a patch as an argument. Additionally, a related vulnerability allows a Regular Expression Denial of Service (ReDoS) when these characters are present in a patch filename header, significantly increasing parsing time."], "mitigation": {"lang": "en:us", "value": "To mitigate this flaw, applications parsing user-supplied patch data should implement input validation to detect and reject input containing line break characters, such as \\r, \\u2028, or \\u2029 before passing the input to the parsePatch and the applyPatch methods, preventing the library from entering an infinite loop and consuming excessive memory."}, "name": "CVE-2026-24001", "package_state": [{"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "nodejs-diff", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-01-22T02:23:44Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-24001\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-24001\nhttps://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5\nhttps://github.com/kpdecker/jsdiff/issues/653\nhttps://github.com/kpdecker/jsdiff/pull/649\nhttps://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx"], "statement": "Applications using the parsePatch and the applyPatch methods to process patches provided by user input are vulnerable to this issue. Specifically, specially crafted patch input with line break characters such as \\r, \\u2028, or \\u2029 can cause an infinite loop, excessive resource consumption and application crashes. This issue can occur even with small payloads or when users control filename headers, allowing a remote attacker to cause a denial of service. Due to this reason, this vulnerability has been rated with an important severity.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-18T15:27:56.043225+00:00", "value": {"mitigation_remediation": ["Upgrade jsdiff to the latest release (at least v8.0.3 for the 8.x series, v5.2.2 for the 5.x series, v4.0.4 for the 4.x series, or v3.5.1 for the 3.x series)", "Avoid parsing patches that contain carriage return, Unicode line separator U+2028, or U+2029 characters in any header", "Validate and sanitize filenames and patch headers before passing them to parsePatch or applyPatch"], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The security issue exists in kpdecker\u2019s jsdiff library in all releases prior to version 8.0.3, 5.2.2, 4.0.4, and 3.5.1. Those specific releases are vulnerable if parsePatch or applyPatch is invoked with a user-controlled patch. Updated releases (8.0.3 and later, 5.2.2 and later, 4.0.4 and later, or 3.5.1 and later) contain the fix and are not affected.", "description_and_impact": "jsdiff\u2019s parsePatch and applyPatch methods can enter an infinite loop when a patch\u2019s filename headers contain carriage return or Unicode line separator characters, consuming unlimited memory until the node.js process terminates. The same flaw also exists in applyPatch when a string patch is parsed. An additional, less intense regular-expression denial of service (ReDOS) can trigger with large patch headers that include these characters, causing parsePatch to execute in cubic time. The vulnerability allows an attacker to cause a targeted application that uses jsdiff to crash or become unresponsive by supplying a specially crafted patch; a large payload is not required, and typical size limits do not mitigate it.", "risk_and_exploitability": "The CVSS score is 2.7, indicating low to moderate severity, and the EPSS score is below 1%, suggesting a very low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog. The attack vector is likely to be an application that accepts user-supplied patches or filenames; by providing a patch containing forbidden line break characters, an attacker can trigger the denial of service. The impact is limited to the process hosting jsdiff, with no direct escalation of privileges or data breach evident from the CVE description."}}}}, "created": "2026-01-22T10:07:57.455393+00:00", "updated": "2026-04-18T15:30:03.968172+00:00", "vendors": ["kpdecker", "kpdecker$PRODUCT$jsdiff"]}