CVE-2026-21619

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.58% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 45.1% of scored records. A rank, not a probability.

NVD base score

2.0 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-02-27 17:57Z6 MO AGO

Last updated

2026-05-27 15:40Z3 MO AGO

Reserved

2026-01-01

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Low (CVSS 2.0)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-502Deserialization of Untrusted DataBase

Data version

5.2

Document digest

4c702bfe075b2252761eb71899e552f7bf182e2e46a623b243a9615148f48bbe

• github.comhttps://github.com/hexpm/hex_core/security/advisories/GHSA-hx9w-f2w9-9g96vendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-21619.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-21619related
• github.comhttps://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b13patch
• github.comhttps://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95patch
• github.comhttps://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9dpatch