How severe is CVE-2020-10878?

CVE-2020-10878 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2020-10878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10878?

CVE-2020-10878 primarily affects Perl. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-10878?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-10878 published?

CVE-2020-10878 was published on 2020-06-05 and last updated on 2026-06-17.

CVE-2020-10878

CVE-2020-10878 is a high-severity vulnerability in Perl with a CVSS 3.x base score of 8.6. 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-190.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Perl
Published: 2020-06-05
Last modified: 2026-06-17

Description

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.

Frequently asked questions

What is CVE-2020-10878?: Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.
How severe is CVE-2020-10878?: CVE-2020-10878 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2020-10878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10878?: CVE-2020-10878 primarily affects Perl. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-10878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-10878 published?: CVE-2020-10878 was published on 2020-06-05 and last updated on 2026-06-17.

References

Affected products (24)

cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_application_processor:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_lnp_application_processor:10.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_lnp_application_processor:10.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_lnp_application_processor:46.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_lnp_application_processor:46.8:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_eagle_lnp_application_processor:46.9:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_lsms:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_offline_mediation_controller:12.0.0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_performance_intelligence_center:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_pricing_design_center:12.0.0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:configuration_manager:12.1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:sd-wan_aware:8.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:sd-wan_aware:9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:sd-wan_aware:9.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*

More vulnerabilities in Perl

CVE-2026-8376 — Critical (CVSS 9.8): Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed…
CVE-2026-4176 — Critical (CVSS 9.8): Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a…
CVE-2022-48522 — Critical (CVSS 9.8): In Perl 5.34.0, function S_find_uninit_var in sv.c has a stack-based crash that can lead to remote code execution or…
CVE-2018-18314 — Critical (CVSS 9.8): Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
CVE-2018-18311 — Critical (CVSS 9.8): Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers…
CVE-2018-18312 — Critical (CVSS 9.8): Perl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular expression that triggers…

All CVEs affecting Perl →

Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

CVE-2026-4689 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was…
CVE-2026-24814 — Critical (CVSS 10.0): Integer Overflow or Wraparound vulnerability in swoole swoole-src (thirdparty/hiredis modules). This vulnerability is…
CVE-2025-64721 — Critical (CVSS 10.0): Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions…
CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2013-2555 — Critical (CVSS 10.0): Integer overflow in Adobe Flash Player before 10.3.183.75 and 11.x before 11.7.700.169 on Windows and Mac OS X, before…

Browse all CWE-190 (Integer Overflow or Wraparound) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

182.93.50.90 (ipv4-addr)
103.165.139.145 (ipv4-addr)
121.40.151.192 (ipv4-addr)
40.83.182.122 (ipv4-addr)
121.84.147.45 (ipv4-addr)