CVE-2026-42309General(python / pillow)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-122

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • pillow

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • General: 2 classified signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-05-09); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
Products
pillow

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-05-09: 2Mentions · 2026-05-11: 1Technical Details · 2026-05-09: 2Technical Details · 2026-05-11: 105-0905-11
Signal classification2 categories
General
266.7%
Disclosure
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-05-092
Disclosure1General1
2026-05-111
General1
Full discourse3 posts
  • CVEarity@CVEarity
    General

    ⚡ New CVE Alert: CVE-2026-42309 📊 Severity: 5.1 🚨 Risk Level: Medium 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-42309 #CVE-2026-42309 #CVE #Medium #CyberSecurity #InfoSec https://t.co/acA2sCiQAO

    Post summary

    The tweet announces CVE-2026‑42309 with a medium 5.1 CVSS score, but offers no further exploitation, PoC, or mitigation details.

    0000045
    157 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-42309 Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePat… https://www.cve.org/CVERecord?id=CVE-2026-42309

    Post summary

    The text offers a brief technical overview of CVE-2026-42309 affecting Pillow 11.2.1–12.1.x, but it does not provide a PoC, exploit, active‑use evidence, patch, or false‑positive claim.

    0000052
    57.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-42309 Heap Buffer Overflow in Pillow Python Imaging Library Versions 11.2.1-12.1.x https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42309

    Post summary

    The post discloses a heap buffer overflow vulnerability (CVE‑2026‑42309) affecting Pillow Python Imaging Library versions 11.2.1 to 12.1.x, with a link to a vulnerability details page.

    0000058
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apppythonpillow---

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