How severe is CVE-2026-93492?

CVE-2026-93492 has a CVSS 3.x base score of 5.3, rated medium 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 low.

Is CVE-2026-93492 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-93492?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-93492 published?

CVE-2026-93492 was published on 2026-09-18 and last updated on 2026-10-16.

CVE-2026-93492

CVE-2026-93492 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. 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-1035.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1035
Published: 2026-09-18
Last modified: 2026-10-16

Description

A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).

Frequently asked questions

What is CVE-2026-93492?: A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).
How severe is CVE-2026-93492?: CVE-2026-93492 has a CVSS 3.x base score of 5.3, rated medium 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 low.
Is CVE-2026-93492 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-93492?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-93492 published?: CVE-2026-93492 was published on 2026-09-18 and last updated on 2026-10-16.

References

Other CWE-1035 vulnerabilities

CVE-2026-93565 — High (CVSS 7.5): A flaw was found in Netty RtspDecoder. The `RtspMethods.valueOf()` function incorrectly strips trailing control bytes…
CVE-2026-93564 — High (CVSS 7.5): A flaw was found in Netty. A reference-count leak in the HAProxy PROXY-v2 message decoder allows a remote,…
CVE-2026-93558 — High (CVSS 7.5): A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this…
CVE-2026-93560 — High (CVSS 7.5): A flaw was found in the Netty STOMP codec. A remote attacker could send a specially crafted STOMP frame with a…
CVE-2026-93575 — High (CVSS 7.5): A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a…
CVE-2026-93563 — High (CVSS 7.5): A flaw was found in Netty's `SmtpResponseDecoder` component. A remote attacker, acting as a malicious or…

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