High severityOSV Advisory· Published Jul 24, 2025· Updated Apr 15, 2026
CVE-2025-6998
CVE-2025-6998
Description
ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7.0 before 0.7.1.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
calibrewebPyPI | <= 0.6.24 | — |
Affected products
2- Range: v0.7.0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-2g7m-ph9x-7q7mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-6998ghsaADVISORY
- fluidattacks.com/advisories/megadethnvdWEB
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