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SCA: security update for github.com/iskorotkov/avro/v2 (GHSA-mc57-h6j3-3hmv)

high Tenable Cloud Security Plugin ID 442048

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, several Avro decoder paths read attacker-
 controlled 64-bit values from the wire format and either narrowed them to platform-sized int before
 bounds-checking, or summed them with overflow-prone signed-int arithmetic. On 32-bit targets (GOARCH=386,
 arm, mips, wasm, etc.), the truncation paths can silently bypass byte-slice limits, select the wrong union
 branch, or hit the OCF negative-make panic via wrap. Three sub-issues are not 32-bit-specific: cumulative-
 size arithmetic overflow in arrayDecoder.Decode / mapDecoder.Decode / mapDecoderUnmarshaler.Decode (wraps
 at math.MaxInt64 on amd64 / arm64 and bypasses MaxSliceAllocSize / MaxMapAllocSize), math.MinInt negation
 in block-header handling, and make([]byte, size) with a negative size in OCF block reads — all three panic
 or bypass caps on any platform, giving an attacker a denial-of-service primitive there. This vulnerability
 is fixed in 2.33.0. (CVE-2026-46384)

Solution

Update the github.com/iskorotkov/avro/v2 library and its related packages to version 2.33.0 or later.

See Also

https://github.com/advisories/GHSA-mc57-h6j3-3hmv

Plugin Details

Severity: High

ID: 442048

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 5/18/2026

Updated: 6/19/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-46384

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 8.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/18/2026

Vulnerability Publication Date: 5/18/2026

Reference Information

CVE: CVE-2026-46384