CVE-2026-71870

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (7th percentile of EPSS-scored CVEs). 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, secondary
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.

CVSS v3
4.8
EG Score
4.8MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 7, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

Version 6.15.0, 2026-08-06

Patch available: py-pdf/pypdf 6.15.0

https://github.com/py-pdf/pypdf/releases/tag/6.15.0
github_commit Patch Available

commit afba8080e19d (py-pdf/pypdf)

Patch available: py-pdf/pypdf 6.15.0 (contains commit afba8080e19d)

https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa
github_pr Patch Available

SEC: Limit token length for ToUnicode entries

Patch available: py-pdf/pypdf 6.15.0 (PR #3944 merged 2026-08-06)

https://github.com/py-pdf/pypdf/pull/3944
github Patch Available

Possible large memory usage for large /ToUnicode streams (Follow-up) · Advisory · py-pdf/pypdf · GitHub

https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c

Vendor Advisories for CVE-2026-71870(1)

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

Affected Packages

(6 across 5 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
pypdf3.17.4-1 ... 6.9.2-2 (15 versions)
  • every version on: no fix on record
—
pypdf22.12.1-3, 2.12.1-3+deb12u1, 2.12.1-4
  • every version on: no fix on record
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf21.26.0-4 ... 2.9.0-1 (24 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf5.4.0-1, 6.19.0-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf5.4.0-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
  • every version up to 6.19.0-1: fixed in 6.19.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf1.0 ... 6.9.2 (112 versions)
  • every version up to 6.15.0: fixed in 6.15.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 37× 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. 2026-10-05 08:12 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-04 05:42 UTCEG score recompute
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-09-30 22:54 UTCEG score recompute
  6. 2026-09-30 15:03 UTCEPSS rescore
  7. 2026-09-29 05:44 UTCEG score recompute
  8. 2026-09-28 13:52 UTCEPSS rescore
  9. 2026-09-27 17:08 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescore
  11. 2026-09-26 15:59 UTCEPSS rescore
  12. 2026-09-25 06:39 UTCEG score recompute
  13. 2026-09-24 04:42 UTCEG score recompute
  14. 2026-09-23 17:54 UTCEPSS rescore
  15. 2026-09-23 02:45 UTCEG score recompute
  16. 2026-09-22 00:47 UTCEG score recompute
  17. 2026-09-21 21:09 UTCEPSS rescore
  18. 2026-09-20 22:50 UTCEG score recompute
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-19 20:10 UTCEG score recompute
  21. 2026-09-18 19:28 UTCEPSS rescore
  22. 2026-09-17 15:10 UTCEG score recompute
  23. 2026-09-16 14:08 UTCEPSS rescore
  24. 2026-09-16 11:08 UTCEG score recompute
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 65 more
  1. 2026-09-15 08:51 UTCEG score recompute
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-14 06:54 UTCEG score recompute
  4. 2026-09-12 03:01 UTCEG score recompute
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 01:03 UTCEG score recompute
  7. 2026-09-10 09:35 UTCEPSS rescore
  8. 2026-09-09 05:59 UTCEG score recompute
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-07 17:42 UTCEG score recompute
  11. 2026-09-06 13:48 UTCEPSS rescore
  12. 2026-09-06 12:56 UTCEG score recompute
  13. 2026-09-05 10:59 UTCEG score recompute
  14. 2026-09-04 09:01 UTCEG score recompute
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-03 04:04 UTCEG score recompute
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-02 00:48 UTCEG score recompute
  19. 2026-09-01 13:54 UTCEPSS rescore
  20. 2026-08-31 22:27 UTCEG score recompute
  21. 2026-08-30 19:17 UTCEPSS rescore
  22. 2026-08-30 12:26 UTCEG score recompute
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-29 10:21 UTCEG score recompute
  25. 2026-08-28 21:42 UTCEPSS rescore
  26. 2026-08-27 21:12 UTCEG score recompute
  27. 2026-08-26 19:16 UTCEG score recompute
  28. 2026-08-26 14:47 UTCEPSS rescore
  29. 2026-08-25 17:18 UTCEG score recompute
  30. 2026-08-25 13:49 UTCEPSS rescore
  31. 2026-08-24 15:10 UTCEG score recompute
  32. 2026-08-23 13:12 UTCEG score recompute
  33. 2026-08-23 00:19 UTCEPSS rescore
  34. 2026-08-22 11:11 UTCEG score recompute
  35. 2026-08-21 23:49 UTCEPSS rescore
  36. 2026-08-21 09:14 UTCEG score recompute
  37. 2026-08-20 22:56 UTCEPSS rescore
  38. 2026-08-20 07:17 UTCEG score recompute
  39. 2026-08-19 17:04 UTCEPSS rescore
  40. 2026-08-19 05:20 UTCEG score recompute
  41. 2026-08-18 13:49 UTCEPSS rescore
  42. 2026-08-18 13:49 UTCEPSS rescore
  43. 2026-08-18 03:17 UTCEG score recompute
  44. 2026-08-17 13:47 UTCEPSS rescore
  45. 2026-08-17 01:15 UTCEG score recompute
  46. 2026-08-16 14:56 UTCEPSS rescore
  47. 2026-08-16 14:56 UTCEPSS rescore
  48. 2026-08-16 02:15 UTCEPSS rescore
  49. 2026-08-15 23:18 UTCEG score recompute
  50. 2026-08-15 01:31 UTCEPSS rescore
  51. 2026-08-14 21:20 UTCEG score recompute
  52. 2026-08-13 22:00 UTCEPSS rescore
  53. 2026-08-12 17:22 UTCEG score recompute
  54. 2026-08-12 13:51 UTCEPSS rescore
  55. 2026-08-11 15:25 UTCEG score recompute
  56. 2026-08-11 00:00 UTCEPSS rescore
  57. 2026-08-10 13:29 UTCEG score recompute
  58. 2026-08-10 12:36 UTCEG score recompute
  59. 2026-08-10 00:23 UTCEG score recompute
  60. 2026-08-09 13:47 UTCEPSS rescore
  61. 2026-08-08 22:27 UTCEG score recompute
  62. 2026-08-08 16:37 UTCEPSS rescore
  63. 2026-08-07 20:30 UTCEG score recompute
  64. 2026-08-07 19:37 UTCEG score recompute
  65. 2026-08-07 19:37 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-71870?
CVE-2026-71870 is a medium vulnerability published on August 7, 2026. pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/cmap.py function parsebfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed…
When was CVE-2026-71870 disclosed?
CVE-2026-71870 was first published on August 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71870 actively exploited?
CVE-2026-71870 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71870?
CVE-2026-71870 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71870?
A fix for CVE-2026-71870 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71870 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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