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PYSEC-2026-1403
No affected components available
ReDoS in Giskard text perturbation detector
A Remote Code Execution (ReDoS) vulnerability was discovered in Giskard component by the GitHub Security Lab team. When processing datasets with specific text patterns with Giskard detectors, this vulnerability could trigger exponential regex evaluation times, potentially leading to denial of service.
Details
The vulnerability affects Giskard's punctuation removal transformation used in the text perturbation detection. A regex used to detect URLs and links was vulnerable to catastrophic backtracking that could be triggered by specific patterns in the text.
Affected version
Giskard versions prior to 2.15.5 are affected. Users should upgrade to version 2.15.5 or later, which includes a fix for this vulnerability.
Impact
This vulnerability can cause extended computation times or crashes in Giskard when processing text containing certain patterns.
Credit
This issue was discovered and reported by GHSL team member @kevinbackhouse (Kevin Backhouse).
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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