VulnSocial

CVE-2026-28804Disclosure(pypdf_project / pypdf)

LOWCVSS 5.3 · MEDIUM

Signal is active with 2 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

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

pypdf_project CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Other references
Weakness type (CWE)
CWE-407

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

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

  • pypdf

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
pypdf_project
Products
pypdf

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-03-06: 2Technical Details · 2026-03-06: 203-06
Signal classification1 categories
Disclosure
2100.0%
Referenced assets3 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-28804 pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes.… https://www.cve.org/CVERecord?id=CVE-2026-28804

    Post summary

    The text describes a denial‑of‑service vulnerability in pypdf versions before 6.7.5, noting that crafted PDFs can cause long runtimes, but it provides no PoC, exploit code, patch information, or evidence of active exploitation.

    00000143
    56.6K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-28804 pypdf Denial of Service via ASCIIHexDecode Stream Filter Before V... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-28804 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    The tweet announces CVE‑2026‑28804, a denial‑of‑service flaw in the pypdf library triggered by the ASCIIHexDecode stream filter before validation, providing a link to further details.

    0000039
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apppypdf_projectpypdf---

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