CVE-2026-78384
Apache CXF: Unbounded DEFLATE Decompression in CXF JOSE/JWE and SAML Processing (Decompression Bomb)
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Apache CXF: Unbounded DEFLATE Decompression in CXF JOSE/JWE and SAML Processing (Decompression Bomb)
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
- Record
CVE-2026-78384- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-409
- Updated
- 2026-11-02
EUVDEUVD-2026-95696
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
- Record
EUVD-2026-95696- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m259-q69p-995q
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap....
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
- Record
GHSA-m259-q69p-995q- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-409
- Updated
- 2026-11-02
NVD
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
- Record
CVE-2026-78384- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-409
- Updated
- 2026-11-02
OSV
Apache CXF: Unbounded DEFLATE Decompression in CXF JOSE/JWE and SAML Processing (Decompression Bomb)
CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation.
Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
- Record
CVE-2026-78384- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVCLSA-2026-1793898246 No score
TuxCare security update for org.apache.cxf (5 CVEs)
TuxCare rebuilt 3 org.apache.cxf packages to address 5 CVEs. Fixed in 3.5.11-tuxcare.11.
- Record
CLSA-2026-1793898246- Updated
- 2026-11-06
OSVCLSA-2026-1793982274 No score
TuxCare security update for org.apache.cxf (5 CVEs)
TuxCare rebuilt 3 org.apache.cxf packages to address 5 CVEs. Fixed in 3.5.9-tuxcare.12.
- Record
CLSA-2026-1793982274- Updated
- 2026-11-06
OSVCLSA-2026-1794008495 No score
TuxCare security update for 8 packages (12 CVEs)
TuxCare rebuilt 8 packages to address 12 CVEs. Fixed in 3.4.5-tuxcare.2.
- Record
CLSA-2026-1794008495- Updated
- 2026-11-07
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.cxf:cxf-coreTuxCare:Maven From an advisory covering 5 CVEs |
3.5.11 up to 3.5.11-tuxcare.11, plus listed versions 3.5.11-tuxcare.13.5.11-tuxcare.103.5.11-tuxcare.23.5.11-tuxcare.33.5.11-tuxcare.4 Show 5 moreShow less3.5.11-tuxcare.53.5.11-tuxcare.63.5.11-tuxcare.73.5.11-tuxcare.83.5.11-tuxcare.9 |
3.5.11-tuxcare.11 |
org.apache.cxf:cxf-rt-frontend-jaxrsTuxCare:Maven From an advisory covering 5 CVEs |
3.5.11 up to 3.5.11-tuxcare.11, plus listed versions 3.5.11-tuxcare.13.5.11-tuxcare.103.5.11-tuxcare.23.5.11-tuxcare.33.5.11-tuxcare.4 Show 5 moreShow less3.5.11-tuxcare.53.5.11-tuxcare.63.5.11-tuxcare.73.5.11-tuxcare.83.5.11-tuxcare.9 |
3.5.11-tuxcare.11 |
org.apache.cxf:cxf-rt-wsdlTuxCare:Maven From an advisory covering 5 CVEs |
3.5.11 up to 3.5.11-tuxcare.11, plus listed versions 3.5.11-tuxcare.13.5.11-tuxcare.103.5.11-tuxcare.23.5.11-tuxcare.33.5.11-tuxcare.4 Show 5 moreShow less3.5.11-tuxcare.53.5.11-tuxcare.63.5.11-tuxcare.73.5.11-tuxcare.83.5.11-tuxcare.9 |
3.5.11-tuxcare.11 |
org.apache.cxf:cxf-coreTuxCare:Maven From an advisory covering 5 CVEs |
3.5.9 up to 3.5.9-tuxcare.12, plus listed versions 3.5.9-tuxcare.103.5.9-tuxcare.113.5.9-tuxcare.23.5.9-tuxcare.33.5.9-tuxcare.4 Show 6 moreShow less3.5.9-tuxcare.53.5.9-tuxcare.63.5.9-tuxcare.73.5.9-tuxcare.83.5.9-tuxcare.93.5.9.tuxcare.1 |
3.5.9-tuxcare.12 |
org.apache.cxf:cxf-rt-frontend-jaxrsTuxCare:Maven From an advisory covering 5 CVEs |
3.5.9 up to 3.5.9-tuxcare.12, plus listed versions 3.5.9-tuxcare.103.5.9-tuxcare.113.5.9-tuxcare.23.5.9-tuxcare.33.5.9-tuxcare.4 Show 6 moreShow less3.5.9-tuxcare.53.5.9-tuxcare.63.5.9-tuxcare.73.5.9-tuxcare.83.5.9-tuxcare.93.5.9.tuxcare.1 |
3.5.9-tuxcare.12 |
org.apache.cxf:cxf-rt-wsdlTuxCare:Maven From an advisory covering 5 CVEs |
3.5.9 up to 3.5.9-tuxcare.12, plus listed versions 3.5.9-tuxcare.103.5.9-tuxcare.113.5.9-tuxcare.23.5.9-tuxcare.33.5.9-tuxcare.4 Show 6 moreShow less3.5.9-tuxcare.53.5.9-tuxcare.63.5.9-tuxcare.73.5.9-tuxcare.83.5.9-tuxcare.93.5.9.tuxcare.1 |
3.5.9-tuxcare.12 |
org.apache.cxf.services.xkms:cxf-services-xkms-x509-repo-ldapTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-coreTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-integration-jcaTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-rt-frontend-jaxrsTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
org.apache.cxf:cxf-rt-rs-security-jose-jaxrsTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-rt-rs-security-oauth2TuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-rt-transports-jmsTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
org.apache.cxf:cxf-rt-wsdlTuxCare:Maven From an advisory covering 12 CVEs |
3.4.5 up to 3.4.5-tuxcare.2, plus listed versions 3.4.5-tuxcare.1 |
3.4.5-tuxcare.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases | OSV | |
| affected, aliases | OSV | |
| affected, aliases, facts | OSV | |
| affected, aliases, facts, references | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-78384 is a high vulnerability (CVSS 7.5) in Apache Cxf, published October 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.