CVE-2025-6069

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

Score 4.3 from GitHub Security Advisory published 2025-06-17. A secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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 (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.6% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
0.6%
EPSS %ILE
46th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). 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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

June 17, 2025

Last Modified

July 31, 2026

Advisory Details (10)

Auto-updated Jul 30, 2026
Patch available. Sources: github_pr, github_commit.
GitHub commit

commit fdc9d214c01c (python/cpython)

Fix landed in python/cpython commit fdc9d214c01c — awaiting tagged release

https://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15
GitHub commit

commit f3c6f882cddc (python/cpython)

Fix landed in python/cpython commit f3c6f882cddc — awaiting tagged release

https://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc
GitHub commit

commit ab0893fd5c57 (python/cpython)

Fix landed in python/cpython commit ab0893fd5c57 — awaiting tagged release

https://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5
GitHub commit

commit 8d1b3dfa0913 (python/cpython)

Fix landed in python/cpython commit 8d1b3dfa0913 — awaiting tagged release

https://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49
Web page

Mailman 3 [CVE-2025-6069] HTMLParser quadratic complexity when processing malformed inputs - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM/
GitHub commit

commit d851f8e258c7 (python/cpython)

Fix landed in python/cpython commit d851f8e258c7 — awaiting tagged release

https://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b
GitHub commit

commit 6eb6c5dbfb52 (python/cpython)

Fix landed in python/cpython commit 6eb6c5dbfb52 — awaiting tagged release

https://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41
GitHub commit

commit 4455cbabf991 (python/cpython)

Fix landed in python/cpython commit 4455cbabf991 — awaiting tagged release

https://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949
GitHub pull request

gh-135462: Fix quadratic complexity in processing special input in HTMLParser

Fix merged in python/cpython PR #135464 on 2025-06-13 — awaiting tagged release

https://github.com/python/cpython/pull/135464
Web page

Worst case quadratic complexity in HTMLParser · Issue #135462 · python/cpython · GitHub

https://github.com/python/cpython/issues/135462

Vendor Advisories for CVE-2025-6069(9)

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

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3.11-venv (3.11.0~rc1-1~22.04.1~esm5) @ jammy2026-07-31ubuntu
redhatrhceph/rhceph-7-rhel9:17695084552026-02-03redhat
redhatrhceph/rhceph-8-rhel9:17695123832026-02-02redhat
redhatrhui5/rhua-rhel9:17683770122026-01-15redhat
redhatdiscovery/discovery-ui-rhel9:17679045732026-01-08redhat
redhatpython3.9-0:3.9.25-2.el9_72025-12-18redhat
redhatpython39-devel:3.9-8100020251126112422.d47b87a42025-12-18redhat

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

(13 across 4 ecosystems)
Debian:11(4)
PackageVulnerable rangeFix by version rangeDependents
jython2.7.2+repack1-3, 2.7.2+repack1-4, 2.7.2+repack1-5, 2.7.3+repack1-1
  • every version on: no fix on record
—
pypy37.3.5+dfsg-2, 7.3.5+dfsg-2+deb11u1, 7.3.5+dfsg-2+deb11u2, 7.3.5+dfsg-2+deb11u3, 7.3.5+dfsg-2+deb11u4
  • every version up to 7.3.5+dfsg-2+deb11u5: fixed in 7.3.5+dfsg-2+deb11u5
—
python2.72.7.18-10 ... 2.7.18-9 (10 versions)
  • every version on: no fix on record
—
python3.93.9.2-1, 3.9.2-1+deb11u1, 3.9.2-1+deb11u2, 3.9.2-1+deb11u3
  • every version up to 3.9.2-1+deb11u4: fixed in 3.9.2-1+deb11u4
—
Debian:12(3)
PackageVulnerable rangeFix by version rangeDependents
jython2.7.3+repack1-1
  • every version on: no fix on record
—
pypy37.3.11+dfsg-2 ... 7.3.23+dfsg-1 (29 versions)
  • every version on: no fix on record
—
python3.113.11.2-6 ... 3.11.2-6+deb12u6 (7 versions)
  • every version up to 3.11.2-6+deb12u7: fixed in 3.11.2-6+deb12u7
—
Debian:13(3)
PackageVulnerable rangeFix by version rangeDependents
jython2.7.3+repack1-1
  • every version on: no fix on record
—
pypy37.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions)
  • every version on: no fix on record
—
python3.133.13.5-2
  • every version up to 3.13.5-2+deb13u1: fixed in 3.13.5-2+deb13u1
—
Debian:14(3)
PackageVulnerable rangeFix by version rangeDependents
jython2.7.3+repack1-1
  • every version on: no fix on record
—
pypy37.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 7.3.20+dfsg-3, 7.3.20+dfsg-4
  • every version up to 7.3.21+dfsg-1: fixed in 7.3.21+dfsg-1
—
python3.133.13.5-2
  • every version up to 3.13.6-1: fixed in 3.13.6-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 31× 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 96 of 210 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 114 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-10-12 16:52 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-10-11 20:27 UTCEG score recompute
  7. 2026-10-11 18:38 UTCEG score recompute
  8. 2026-10-11 15:13 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-10 10:03 UTCOSV refresh
  12. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
Show 71 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-09-20 19:44 UTCOSV refresh
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-09-01 19:35 UTCOSV refresh
  19. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  26. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  27. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  28. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  30. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  31. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  32. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  33. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  34. 2026-08-15 21:07 UTCOSV refresh
  35. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  36. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  37. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  38. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  39. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  40. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  41. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  42. 2026-08-07 16:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  43. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  44. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  45. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  46. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  47. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  48. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-07-31 14:25 UTCEG score recompute
  50. 2026-07-31 14:25 UTCVendor advisory
  51. 2026-07-31 14:25 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  52. 2026-07-31 14:09 UTCEG score recompute
  53. 2026-07-31 14:09 UTCVendor advisory
  54. 2026-07-31 14:09 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  55. 2026-07-30 23:20 UTCEG score recompute
  56. 2026-07-30 23:20 UTCVendor advisory
  57. 2026-07-30 23:20 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  58. 2026-07-30 22:22 UTCEG score recompute
  59. 2026-07-30 22:22 UTCVendor advisory
  60. 2026-07-30 22:21 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  61. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  62. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-07-27 18:54 UTCOSV refresh
  64. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  66. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  67. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  68. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  69. 2026-07-23 03:00 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  71. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 37th percentile

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-6069?
CVE-2025-6069 is a medium-severity vulnerability; its CVE record was published on June 17, 2025. The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
When was the CVE record for CVE-2025-6069 published?
The CVE record for CVE-2025-6069 was published on June 17, 2025. 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 July 31, 2026; the record at its source may have been updated since.
Is CVE-2025-6069 actively exploited?
CVE-2025-6069 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-6069?
CVE-2025-6069 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-6069?
A fix for CVE-2025-6069 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-6069 are linked in the Vendor Advisories panel on this page.

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