Memory leak in Privoxy
Priority LOW 36CWE-401Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.
Summary
A vulnerability was found in Privoxy which was fixed in get_url_spec_param() by freeing memory of compiled pattern spec before bailing.
Why it matters now
EPSS 0.01383 72nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Privoxy | Privoxy 3.0.33 | — | No fix listed | CNA |
- Privoxy Vendor— Affected Privoxy 3.0.33 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-44540
- 2026-10-03 Alias added: GHSA-c56j-2h63-6488
References
More Privoxy vulnerabilities
- TI-2016-01816 The client_host function in parsers.c in Privoxy before 3.0.24 allows remote attackers to… CVSS 3.0HIGH 7.5
- TI-2016-01815 The remove_chunked_transfer_coding function in filters.c in Privoxy before 3.0.24 allows… CVSS 3.0HIGH 7.5
- TI-2021-03567 Memory corruption in privoxy CVSS 3.1HIGH 7.5
- TI-2021-03566 Memory corruption in privoxy CVSS 3.1HIGH 7.5
- TI-2021-03565 NULL pointer dereference in privoxy CVSS 3.1HIGH 7.5
- TI-2021-03564 Improper input validation in privoxy CVSS 3.1HIGH 7.5
Sources
- CVE-2021-44540 · CVE Program
- CVE-2021-44540 · NVD
- FIRST EPSS
- GHSA-c56j-2h63-6488 · GitHub Advisory Database · CC BY 4.0
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