THREAT OPS › Threat News › [GHSA] GHSA-gqr6-r77p-c2pj (high) — Fortigate syslog message parser can be exploited to modify or delete fields from the original message
[GHSA] GHSA-gqr6-r77p-c2pj (high) — Fortigate syslog message parser can be exploited to modify or delete fields from the original message
GHSA-gqr6-r77p-c2pj Severity: high CVE: CVE-2026-55841
Fortigate syslog message parser can be exploited to modify or delete fields from the original message
### Impact
A security issue has been identified in Graylog affecting the parsing of syslog messages that use a key-value format, such as those generated by Fortigate devices.
The vulnerability allows attackers to overwrite individual messa
Indicators of compromise
- CVE-2026-55841cve
- https://go2docs.graylog.org/current/getting_in_log_data/indexer_and_processing_failures.htmlurl
Original source: https://github.com/advisories/GHSA-gqr6-r77p-c2pj