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CVE-2026-43823

HIGH
7.5
CVSS Score
Published: July 23, 2026 at 02:33 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorSwift Crypto

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Swift Crypto· Apple
95%
3.2.0 ≤ v ≤ 4.5.1
Affected range stops below 4.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-415

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