PYSEC-2026-1425

    Dashboard / Vulnerabilities / PYSEC-2026-1425

    PYSEC-2026-1425

    Published: 7 Jul 2026Last Modified: 7 Jul 2026

    Summary: gRPC Reachable Assertion issue

    Details: There exists an vulnerability causing an abort() to be called in gRPC.  The following headers cause gRPC's C++ implementation to abort() when called via http2: te: x (x != trailers) :scheme: x (x != http, https) grpclb_client_stats: x (x == anything) On top of sending one of those headers, a later header must be sent that gets the total header size past 8KB. We recommend upgrading past git commit 2485fa94bd8a723e5c977d55a3ce10b301b437f8 or v1.53 and above.

    References: https://nvd.nist.gov/vuln/detail/CVE-2023-1428, https://github.com/grpc/grpc/issues/33463, https://github.com/grpc/grpc/commit/2485fa94bd8a723e5c977d55a3ce10b301b437f8, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-1428.yml, https://pypi.org/project/grpcio, https://github.com/advisories/GHSA-6628-q6j9-w8vg

    Affected packages

    Package

    Name: grpcio

    Purl: pkg:pypi/grpcio

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 1.51.0
    Fixed -1.53.0

    Affected versions

    1.51.0
    1.51.1
    1.51.3

    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
    PYSEC-2026-1425 | CVE-DB