CVE-2026-28815
CVE-2026-28815 is a high-severity vulnerability in Apple Swift-crypto with a CVSS 3.x base score of 7.5. 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-125.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-18570
- Weakness: CWE-125
- Affected product: Apple Swift-crypto
- Published:
- Last modified:
Description
A remote attacker can supply a short X-Wing HPKE encapsulated key and trigger an out-of-bounds read in the C decapsulation path, potentially causing a crash or memory disclosure depending on runtime protections. This issue is fixed in swift-crypto version 4.3.1.
Frequently asked questions
- What is CVE-2026-28815?
- A remote attacker can supply a short X-Wing HPKE encapsulated key and trigger an out-of-bounds read in the C decapsulation path, potentially causing a crash or memory disclosure depending on runtime protections. This issue is fixed in swift-crypto version 4.3.1.
- How severe is CVE-2026-28815?
- CVE-2026-28815 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-28815 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-28815?
- CVE-2026-28815 affects Apple Swift-crypto. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-28815?
- 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.
- Does CVE-2026-28815 have an EU (EUVD) identifier?
- Yes. CVE-2026-28815 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18570.
- When was CVE-2026-28815 published?
- CVE-2026-28815 was published on 2026-04-03 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:apple:swift-crypto:*:*:*:*:*:swift:*:*
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