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TI-2026-85880 Aliases CVE-2026-84161

Unbounded zlib decompression in CodeChecker enables denial of service

Priority LOW 22CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Ericsson CodeChecker before 6.29.3 passes attacker-supplied Base64 data to one-shot zlib decompression with no size limit (CWE-409). An authenticated store user with product store permission can send a highly compressed payload that exhausts API worker or host memory and writes the full decompressed output to disk. The flaw is reachable only when an operator enables store.analysis_statistics_dir, which is disabled by default.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

When an operator enables store.analysis_statistics_dir, a network client with PRODUCT_STORE permission for a product can call that product's storeAnalysisStatistics Thrift-over-HTTP method. CodeChecker 6.29.0 decodes the attacker-controlled Base64 string and passes the complete compressed input to one-shot zlib.decompress(). No maximum decompressed size is enforced. This gives a correctly authorized, non-superuser store account a high-ratio memory and persistent-disk amplification primitive. The complete output is first materialized as a Python bytes object and is then written to the configured statistics directory. A sufficiently scaled payload can exhaust the API worker or host memory and impair CodeChecker availability. The shipped value of store.analysis_statistics_dir is null, so the affected feature is disabled by default. The primary assessment does not rely on authentication being disabled. There is no authorization bypass and no path traversal in this report.

Why it matters now

EPSS 0.00313 24th percentileScored 2026-11-07
Fix Fixed CodeChecker (Ericsson): 6.29.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
EricssonCodeCheckerbefore 6.29.36.29.3Patch availableCNA
  • CodeChecker VendorEricsson Affected before 6.29.3 Fixed in 6.29.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:ericsson:codechecker:*:*:*:*:*:*:*:*——Ericsson
  • cpe:2.3:a:ericsson:codechecker:*:*:*:*:*:*:*:* Versions — — ·Ericsson

Remediation

Upgrade Ericsson CodeChecker to 6.29.3, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA CodeChecker (Ericsson) Fixed in 6.29.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Ericsson CodeChecker 6.29.3

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-85815 Session tokens stay valid after logout in CodeCheckerPriority LOW 23
    • TI-2026-85879 Stored cross-site scripting in CodeChecker HTML report exportPriority LOW 3
    Show all 3 records →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-84161

References

Other 1

  • TI-2024-09344 Authentication bypass in Ericsson CodeChecker CVSS 3.1CRITICAL 10.0
  • TI-2024-36027 Cross-Site Request Forgery in CodeChecker API CVSS 3.1HIGH 8.2
  • TI-2025-27277 Buffer overflow in CodeChecker log command CVSS 3.1HIGH 7.8
  • TI-2023-27200 Path traversal in `CodeChecker server` in the endpoint of `CodeChecker store` CVSS 3.1MEDIUM 6.5
  • TI-2026-41851 Authenticated Remote Denial of Service via Unbounded zlib Decompression in massStoreRun CVSS 4.0MEDIUM 5.5
  • TI-2021-19324 In Ericsson Network Location before 2021-07-31, it is possible for an authenticated… CVSS 3.1HIGH 8.8
See all 60 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences