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Wireshark disclosed CVE-2026-6868, a stack-based buffer overflow in its HTTP protocol dissector that can cause a denial of service by crashing the application. The flaw affects Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14, and can be triggered if an attacker injects a malformed packet onto the network or convinces a user to open a crafted packet capture file.
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On April 30, 2026, the CVE record for CVE-2026-6868 was published, describing the flaw as a stack-based buffer overflow in Wireshark's HTTP protocol dissector that can cause a denial of service by crashing the application. The record lists a CVSS v3.1 score of 5.5, credits Sharon Brizinov as the finder, and references the Wireshark advisory.
On April 29, 2026, Wireshark published advisory WNPA-SEC-2026-46 for an HTTP protocol dissector crash tracked as CVE-2026-6868. The issue affects versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14, and Wireshark said it was fixed in versions 4.6.5 and 4.4.15; no exploits were known at publication time.
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Wireshark disclosed **CVE-2026-5653**, a heap-based buffer overflow in its DCP-ETSI protocol dissector that can crash the network protocol analyzer and cause a denial of service. The flaw affects Wireshark versions `4.6.0` through `4.6.4` and `4.4.0` through `4.4.14`, and was assigned **CWE-122** with a **CVSS v3.1 score of 5.5**. According to the advisory, an attacker could trigger the issue by injecting a malformed packet onto the network or by convincing a user to open a crafted packet capture file. Wireshark fixed the vulnerability in versions `4.6.5` and `4.4.15`; the issue was discovered by Alexandre de Oliveira, and the vendor said no active exploits were known at the time of disclosure.
Aug 21, 2026
Wireshark disclosed a denial-of-service vulnerability in its BEEP protocol dissector that can crash the packet analyzer through a stack-call overflow caused by recursive function handling. The issue is tracked as **CVE-2026-6538** and documented in advisory **`wnpa-sec-2026-23`**, with the underlying bug reported in Wireshark's issue tracker as a BEEP dissector stack-call overflow. The flaw affects Wireshark versions **4.6.0 through 4.6.4** and **4.4.0 through 4.4.14**. According to the vendor, an attacker could trigger the crash by injecting a malformed packet onto the network or by convincing a user to open a crafted capture file. Wireshark said no active exploits are known, credited Sharon Brizinov with discovery, and released fixes in versions **4.6.5** and **4.4.15**.
Aug 21, 2026
Wireshark disclosed a high-severity flaw in its Kerberos protocol dissector that can crash **Wireshark** or **TShark** when processing malformed traffic or packet captures. The bug, tracked as `CVE-2026-76924` and documented in advisory `wnpa-sec-2026-78`, stems from an out-of-bounds read while formatting a preview of a learned `EncryptionKey` from plaintext Kerberos credential data. Researchers reported that a crafted `EncKrbCredPart`, including traffic delivered over UDP/88, could trigger a heap-buffer-overflow even without a valid keytab, valid key, or successful decryption. The vendor said the issue affects Wireshark versions **4.6.0 through 4.6.7** and **4.4.0 through 4.4.17**, and it has been fixed in **4.6.8** and **4.4.18**. The root cause was that the dissector copied bounded key bytes into retained storage but still read four bytes from the original input buffer, allowing one- to three-byte keys to cause the crash; the fix reformats the preview from a zero-initialized retained buffer after the bounded copy. Wireshark said malformed packets injected onto a network or malicious packet capture files could trigger the vulnerability, and no active exploits are known.
Aug 21, 2026