CVE-2021-36373

CVE-2021-36373 is a medium-severity vulnerability in Apache Ant with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-130.

Key facts

• Severity: Medium (CVSS 3.x base score 5.5)
• CVSS v2: 4.3
• EPSS exploit prediction: 3% (84th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-130
• Affected product: Apache Ant
• Published: 2021-07-14
• Last modified: 2026-08-25

Description

When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant. Apache Ant prior to 1.9.16 and 1.10.11 were affected.

Frequently asked questions

What is CVE-2021-36373?

When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant. Apache Ant prior to 1.9.16 and 1.10.11 were affected.

How severe is CVE-2021-36373?

CVE-2021-36373 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-36373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36373?

CVE-2021-36373 primarily affects Apache Ant. In total, 69 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36373 published?

CVE-2021-36373 was published on 2021-07-14 and last updated on 2026-08-25.

References

• https://ant.apache.org/security.html
• https://lists.apache.org/thread.html/r27919fd4db07c487239c1d9771f480d89ce5ee2750aa9447309b709a%40%3Ccommits.groovy.apache.org%3E
• https://lists.apache.org/thread.html/r544c9e8487431768465b8b2d13982c75123109bd816acf839d46010d%40%3Ccommits.groovy.apache.org%3E
• https://lists.apache.org/thread.html/r54afdab05e01de970649c2d91a993f68a6b00cd73e6e34e16c832d46%40%3Cuser.ant.apache.org%3E
• https://lists.apache.org/thread.html/rad36f470647c5a7c02dd78c9973356d2840766d132b597b6444e373a%40%3Cnotifications.groovy.apache.org%3E
• https://lists.apache.org/thread.html/rf4bb79751a02889623195715925e4fd8932dd3c97e0ade91395a96c6%40%3Cdev.myfaces.apache.org%3E
• https://security.netapp.com/advisory/ntap-20210819-0007/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://www.oracle.com/security-alerts/cpuoct2021.html

Affected products (69)

• cpe:2.3:a:apache:ant:*:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:banking_trade_finance:14.5:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:banking_treasury_management:14.5:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_cloud_native_core_automated_test_suite:1.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_order_and_service_management:7.3:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_order_and_service_management:7.4:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:communications_unified_inventory_management:7.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:enterprise_repository:11.1.1.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:insurance_policy_administration:*:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:primavera_unifier:*:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:primavera_unifier:18.8:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:primavera_unifier:19.12:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:primavera_unifier:20.12:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:real-time_decision_server:3.2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:real-time_decision_server:11.1.1.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_advanced_inventory_planning:14.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_advanced_inventory_planning:15.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_advanced_inventory_planning:16.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_back_office:14.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_back_office:14.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_bulk_data_integration:16.0.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_bulk_data_integration:19.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_central_office:14.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_central_office:14.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_eftlink:19.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_eftlink:20.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_extract_transform_and_load:13.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_financial_integration:14.1.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_financial_integration:15.0.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_financial_integration:16.0.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_integration_bus:14.1.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:retail_integration_bus:15.0.4.0:*:*:*:*:*:*:*

More vulnerabilities in Apache Ant

• CVE-2020-11979 — High (CVSS 7.5): As mitigation for CVE-2020-1945 Apache Ant 1.10.8 changed the permissions of temporary files it created so that only…
• CVE-2026-78254 — High (CVSS 7.4): The ftp and scp tasks of Apache Ant can download files from a remote server. A malicious server can provide relative…
• CVE-2020-1945 — Medium (CVSS 6.3): Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7 uses the default temporary directory identified by the Java system…
• CVE-2021-36374 — Medium (CVSS 5.5): When reading a specially crafted ZIP archive, or a derived formats, an Apache Ant build can be made to allocate large…

All CVEs affecting Apache Ant →

Other CWE-130 vulnerabilities

• CVE-2022-2714 — Critical (CVSS 9.8): Improper Handling of Length Parameter Inconsistency in GitHub repository francoisjacquet/rosariosis prior to 10.0.
• CVE-2026-18397 — Critical (CVSS 9.4): This vulnerability enables unauthenticated remote code execution (RCE) on a victim's machine by exploiting a…
• CVE-2026-9054 — Critical (CVSS 9.2): An attacker sending tcp, il, rudp, rudp, or gre packets with a length less than the header size would trigger a kernel…
• CVE-2026-5706 — High (CVSS 8.9): In Bluetooth Mesh SDK 6.1.4 and earlier, malformed extended advertisements can trigger out-of-bounds writes leading to…
• CVE-2026-58096 — High (CVSS 8.8): LcpDecodeConfig() did not validate the length of received endpoint discriminator options against the minimum required…
• CVE-2022-1543 — High (CVSS 8.8): Improper handling of Length parameter in GitHub repository erudika/scoold prior to 1.49.4. When the text size is large…

Browse all CWE-130 vulnerabilities →