CVE-2026-107937, CVE-2026-108039

Data: 2026-10-17

Severity: High

CVSS Score:

• CVE-2026-107937: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

• CVE-2026-108039: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Riferimenti:

• CVE-2026-107937:

  • https://nvd.nist.gov/vuln/detail/CVE-2026-107937

  • https://cxf.apache.org/security-advisories.data/CVE-2026-107937.txt

• CVE-2026-108039:

  • https://nvd.nist.gov/vuln/detail/CVE-2026-108039

  • https://cxf.apache.org/security-advisories.data/CVE-2026-108039.txt

Libreria: org.apache.cxf:cxf-core (versioni affette: < 3.6.13, 4.0.0 - 4.1.8 e 4.2.0 - 4.2.3)

Descrizione

1. [CVE-2026-107937] CWE-770: Allocation of Resources Without Limits or Throttling

In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (default 500) limits. The size limit was applied only to each physical line, not to a header value built from continuation lines or to the combined values of a repeated header. The count limit was checked against the number of distinct header names, not the total number of header lines. A remote, unauthenticated attacker could send a multipart request with very large folded or repeated part headers. The server would then allocate memory without bound, causing a denial of service. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

2. [CVE-2026-108039] CWE-776: Improper Restriction of Recursive Entity References in DTDs (“XML Entity Expansion”)

By default, StaxUtils placed no limit on the total number of elements or the total number of characters in an XML document. A very large request could therefore use a lot of memory and CPU during parsing, especially where CXF builds a DOM from the input (for example SAAJ or WS-Security), and could cause a denial of service when no request size limit was configured. Both limits now have defaults: the maximum element count is 100 × maxChildElements (5,000,000 by default), and the maximum document size is 256M characters. Applications that process larger documents can raise the limits with the org.apache.cxf.stax.maxElementCount and org.apache.cxf.stax.maxXMLCharacters properties. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

GovWay

Versione affette:

• 3.3.x: <= 3.3.20

• 3.4.x: <= 3.4.3

Risoluzione:

• 3.3.x: 3.3.21

• 3.4.x: 3.4.4