CVE-2026-23750
CVE-2026-23750 is a high-severity vulnerability with a CVSS 3.x base score of 8.1. 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-122.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- CVSS v4: 7.2
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-8870
- Weakness: CWE-122
- Published:
- Last modified:
Description
Golioth Pouch version 0.1.0, prior to commit 1b2219a1, contains a heap-based buffer overflow in BLE GATT server certificate handling. server_cert_write() allocates a heap buffer of size CONFIG_POUCH_SERVER_CERT_MAX_LEN when receiving the first fragment, then appends subsequent fragments using memcpy() without verifying that sufficient capacity remains. An adjacent BLE client can send unauthenticated fragments whose combined size exceeds the allocated buffer, causing a heap overflow and crash; integrity impact is also possible due to memory corruption.
Frequently asked questions
- What is CVE-2026-23750?
- Golioth Pouch version 0.1.0, prior to commit 1b2219a1, contains a heap-based buffer overflow in BLE GATT server certificate handling. server_cert_write() allocates a heap buffer of size CONFIG_POUCH_SERVER_CERT_MAX_LEN when receiving the first fragment, then appends subsequent fragments using memcpy() without verifying that sufficient capacity remains. An adjacent BLE client can send unauthenticated fragments whose combined size exceeds the allocated buffer, causing a heap overflow and crash; integrity impact is also possible due to memory corruption.
- How severe is CVE-2026-23750?
- CVE-2026-23750 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
- Is CVE-2026-23750 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-23750?
- 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-2026-23750 have an EU (EUVD) identifier?
- Yes. CVE-2026-23750 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8870.
- When was CVE-2026-23750 published?
- CVE-2026-23750 was published on 2026-02-26 and last updated on 2026-06-17.
References
- https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/
- https://github.com/golioth/pouch/commit/1b2219a1
- https://secmate.dev/disclosures/SECMATE-2025-0018
- https://www.vulncheck.com/advisories/golioth-pouch-ble-gatt-heap-based-buffer-overflow
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