CVE-2026-82049

HIGHPre-NVD 8.48.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (8th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-77772 (ENISA EUVD) · GHSA-ghff-gcpf-9r9p (GitHub Security Advisories)Source: ENISA EUVD

8.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity84% × 45%
Impact severity (EG Severity): CVSS 8.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.4): severity, escalated by confirmed exploitation. This CVE's 8.4 is its impact severity (EG Severity), not escalated.

EG Severity
8.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 14, 2026

Last Modified

October 11, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
Patch available. Sources: github_commit, github_pr.
Web page

Mailman 3 [CVE-2026-82049] tarfile extraction filters allow file modification and content disclosure via hard link to symlink - Security-announce - python.org

https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/
GitHub pull request

gh-157190: Follow symlinks when extracting `tarfile` hard links

Fix merged in python/cpython PR #157191 on 2026-09-10 — awaiting tagged release

https://github.com/python/cpython/pull/157191
Web page

tarfile `data`/`tar` filter bypass via hard link to a symlink · Issue #157190 · python/cpython · GitHub

https://github.com/python/cpython/issues/157190
GitHub commit

commit 5a57248b22ad (python/cpython)

Fix landed in python/cpython commit 5a57248b22ad — awaiting tagged release

https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatpython3-10-main-3.10.21-1.3.hum12026-09-16redhat
redhatpython3-11-main-3.11.16-1.4.hum12026-09-16redhat
redhatpython3-12-main-3.12.14-1.3.hum12026-09-16redhat
redhatpython3-13-main-3.13.15-1.3.hum12026-09-16redhat
redhatpython3-14-main-3.14.7-1.1.hum12026-09-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 6 ecosystems)
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2 ... 8.0.0+dfsg-1 (13 versions)
  • every version on: no fix on record
—
python3.133.13.11-1 ... 3.13.9-1 (14 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2 ... 8.0.0+dfsg-1 (13 versions)
  • every version on: no fix on record
—
python3.133.13.11-1 ... 3.13.9-1 (9 versions)
  • every version on: no fix on record
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.12.15-r0: fixed in 3.12.15-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.12.15-r0: fixed in 3.12.15-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.12.15-r0: fixed in 3.12.15-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.14.8-r0: fixed in 3.14.8-r0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 88× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 206 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 106 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-10-28 15:02 UTCEG score recompute
  7. 2026-10-28 15:02 UTCVendor advisory
  8. 2026-10-28 15:02 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  11. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  12. 2026-10-25 13:58 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-20 18:06 UTCEG score recompute
  18. 2026-10-20 18:06 UTCVendor advisory
  19. 2026-10-20 18:05 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-18 03:08 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 75 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-13 06:10 UTCEG score recompute
  5. 2026-10-13 06:10 UTCVendor advisory
  6. 2026-10-13 06:09 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  7. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-12 14:56 UTCEG score recompute
  9. 2026-10-11 19:20 UTCEG score recompute
  10. 2026-10-11 16:36 UTCEG score recompute
  11. 2026-10-11 14:17 UTCVendor advisory
  12. 2026-10-11 14:16 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  13. 2026-10-11 13:54 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-11 01:24 UTCEG score recompute
  16. 2026-10-11 01:24 UTCVendor advisory
  17. 2026-10-11 01:24 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  18. 2026-10-11 01:12 UTCEG score recompute
  19. 2026-10-11 01:12 UTCVendor advisory
  20. 2026-10-11 01:12 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  21. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-10 17:50 UTCVendor advisory
  23. 2026-10-10 17:50 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  24. 2026-10-10 04:58 UTCEG score recompute
  25. 2026-10-10 04:58 UTCVendor advisory
  26. 2026-10-10 04:58 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  27. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  28. 2026-10-09 16:11 UTCVendor advisory
  29. 2026-10-09 16:11 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  30. 2026-10-08 23:58 UTCEG score recompute
  31. 2026-10-08 23:58 UTCVendor advisory
  32. 2026-10-08 23:58 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  33. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  34. 2026-10-08 11:11 UTCEG score recompute
  35. 2026-10-08 11:11 UTCVendor advisory
  36. 2026-10-08 11:11 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  37. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  38. 2026-10-07 22:23 UTCVendor advisory
  39. 2026-10-07 22:23 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  40. 2026-10-07 09:24 UTCVendor advisory
  41. 2026-10-07 09:24 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  42. 2026-10-06 20:36 UTCEG score recompute
  43. 2026-10-06 20:36 UTCVendor advisory
  44. 2026-10-06 20:36 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  45. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  46. 2026-10-06 07:49 UTCVendor advisory
  47. 2026-10-06 07:49 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  48. 2026-10-05 19:03 UTCEG score recompute
  49. 2026-10-05 19:03 UTCVendor advisory
  50. 2026-10-05 19:02 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  51. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  52. 2026-10-05 06:15 UTCEG score recompute
  53. 2026-10-05 06:15 UTCVendor advisory
  54. 2026-10-05 06:15 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  55. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  56. 2026-10-04 17:27 UTCVendor advisory
  57. 2026-10-04 17:27 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  58. 2026-10-04 04:40 UTCVendor advisory
  59. 2026-10-04 04:40 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  60. 2026-10-03 15:53 UTCEG score recompute
  61. 2026-10-03 15:53 UTCVendor advisory
  62. 2026-10-03 15:53 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  63. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  64. 2026-10-03 03:04 UTCEG score recompute
  65. 2026-10-03 03:04 UTCVendor advisory
  66. 2026-10-03 03:04 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  67. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  68. 2026-10-02 14:17 UTCVendor advisory
  69. 2026-10-02 14:17 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  70. 2026-10-02 01:26 UTCEG score recompute
  71. 2026-10-02 01:26 UTCVendor advisory
  72. 2026-10-02 01:26 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH
  73. 2026-10-02 00:51 UTCEG score recompute
  74. 2026-10-02 00:51 UTCVendor advisory
  75. 2026-10-02 00:51 UTCGHSA enrichmentGHSA-ghff-gcpf-9r9p · GitHub severity HIGH

Frequently asked(5)

What is CVE-2026-82049?
CVE-2026-82049 is a high-severity vulnerability; its CVE record was published on September 14, 2026. In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose…
When was the CVE record for CVE-2026-82049 published?
The CVE record for CVE-2026-82049 was published on September 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 11, 2026; the record at its source may have been updated since.
Is CVE-2026-82049 actively exploited?
CVE-2026-82049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82049?
CVE-2026-82049 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82049?
A fix for CVE-2026-82049 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-82049 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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