CVE Feed

    Dashboard / CVE / CVE-2025-6069

    CVE-2025-6069

    The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

    Published:Jun 17, 2025
    Last Modified:Apr 22, 2026
    EPS:Jun 17, 2025
    EPSS Score:0.00864
    CVSS Score:4.3

    Affected Products

    Vendor
    Python
    Product
    Cpython

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

    Related CVEs

    CVE-2026-15310 (CVSS 2.1) — When decompressing crafted zip files using the bzip/LZMA/Zstandard compressions, Python could use an attacke…
    CVE-2026-19672 (CVSS 6.3) — The tarfile module's tar and data extraction filters created directories outside the destination for members…
    CVE-2026-15806 (CVSS 6) — The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRe…
    CVE-2026-17084 (CVSS 6) — The "stringprep" module didn't process characters from RFC 3454 tables B.2 or B.3 correctly: the latest Unico…
    CVE-2026-18503 (CVSS 2.4) — Attacker-controlled CSV samples can trigger super-linear regular-expression work during dialect sniffing and …
    CVE-2026-6879 (CVSS 2) — `Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath …
    CVE-2026-15308 (CVSS 8.7) — The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated untermi…
    CVE-2026-4360 (CVSS 2) — In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An a…
    CVE-2026-11972 (CVSS 8.2) — When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not …
    CVE-2026-0864 (CVSS 4.1) — When using the "configparser" module to write configuration files containing multi-line text values with carri…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High