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TI-2026-70996 Aliases CVE-2026-109229GHSA-fqvf-j3pr-77v9

SGLang disables decompression bomb check, enabling denial of service

Priority HIGH 77CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

SGLang through 0.5.21 is affected. Its NanoNemotronVLImageProcessor sets Pillow's Image.MAX_IMAGE_PIXELS to None, which disables decompression bomb protection for the whole process (CWE-409). A remote, unauthenticated attacker can submit small, highly compressed images with huge dimensions to the generic image loader, exhausting worker memory during decoding.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

SGLang through 0.5.21 contains a denial of service vulnerability that disables Pillow decompression bomb protection process-wide by setting Image.MAX_IMAGE_PIXELS to None in NanoNemotronVLImageProcessor. Remote attackers can submit small, highly compressed images with huge dimensions to the generic image loader, exhausting worker memory during decoding.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00505 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sgl-projectsglangup to 0.5.21—No fix listedCNA
  • sglang Vendorsgl-project Affected up to 0.5.21 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for SGLang.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109229
  2. 2026-10-12 Alias added: GHSA-fqvf-j3pr-77v9
  3. 2026-10-13 CISA SSVC decision points changed
  4. 2026-10-13 Priority changed: MEDIUM → HIGH

References

Other 4

  • TI-2026-76247 Denial of service in SGLang expert-distribution recording endpoint CVSS 4.0HIGH 8.7
  • TI-2026-70994 SGLang Memory Exhaustion DoS via Qwen-VL Video Preprocessing CVSS 4.0HIGH 8.7
  • TI-2026-70993 Decompression amplification in SGLang load_audio exhausts memory CVSS 4.0HIGH 8.7
  • TI-2026-65453 SGLang through 0.5.20 Denial of Service via Duplicate bootstrap_room CVSS 4.0HIGH 8.7
  • TI-2026-75290 Code injection in SGLang debug dumper filter CVSS 4.0CRITICAL 9.2
  • TI-2026-76467 Server-side request forgery in SGLang via bootstrap_host and bootstrap_port CVSS 4.0MEDIUM 6.9
See all 21 →

Sources

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