CVE-2026-49460

LOWNVD 3.33.3—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.3 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
3.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.

CVSS v3
3.3
EG Score
3.3(medium)
EPSS
1.9%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 25, 2026

Advisory Details (3)

Auto-updated Jun 23, 2026
Patch available. Sources: github_pr, github_release, github.
github Patch Available

Inefficient decoding of FlateDecode PNG predictor streams · Advisory · py-pdf/pypdf · GitHub

https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg
github_release Patch Available

Version 6.12.2, 2026-05-26

Patch available: py-pdf/pypdf 6.12.2

https://github.com/py-pdf/pypdf/releases/tag/6.12.2
github_pr Patch Available

SEC: Optimize _decode_png_prediction regarding memory and speed

Patch available: py-pdf/pypdf 6.12.2 (PR #3806 merged 2026-05-26)

https://github.com/py-pdf/pypdf/pull/3806

Vendor Advisories for CVE-2026-49460(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pypdf1.0 ... 6.9.2 (104 versions)6.12.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 02:23 UTCEPSS rescore
  3. 2026-07-06 00:33 UTCEG score recompute
  4. 2026-07-05 02:30 UTCEPSS rescore
  5. 2026-07-04 06:31 UTCEPSS rescore
  6. 2026-07-02 17:30 UTCEG score recompute
  7. 2026-07-01 15:07 UTCEPSS rescore
  8. 2026-06-30 23:22 UTCEPSS rescore
  9. 2026-06-29 10:39 UTCEG score recompute
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 03:50 UTCEG score recompute▼ 1.80
  13. 2026-06-25 17:48 UTCNVD updateCVSS v3 → 3.3 · severity → LOW
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-25 01:47 UTCEG score recompute
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 23:45 UTCEG score recompute
  18. 2026-06-23 21:33 UTCEPSS rescore
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 21:40 UTCEG score recompute▲ 5.10
  21. 2026-06-22 21:37 UTCNVD updateCVSS v3 → 5.1 · CVSS v4 → 5.1
  22. 2026-06-16 14:09 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-49460?
CVE-2026-49460 is a low vulnerability published on June 16, 2026. pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.
When was CVE-2026-49460 disclosed?
CVE-2026-49460 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49460 actively exploited?
CVE-2026-49460 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49460?
CVE-2026-49460 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2026-49460?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49460, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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