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

Also known asEUVD-2025-18496 (ENISA EUVD) · GHSA-j5cc-6rx8-ff96 (GitHub Security Advisories)Source: ENISA EUVD

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 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)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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
48th
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 (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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 every mission impact level.CISA BOD 26-04: 60 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 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.

The score's inputs: 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/security-announce@python.org/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

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.13+esm19) @ xenial2026-10-23ubuntu
redhatpython3.9-0:3.9.16-1.el9_2.152026-10-06redhat
redhatpython3.9-0:3.9.18-3.el9_4.142026-09-30redhat
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 8× in last 7d / 40× 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 99 of 235 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 136 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-10-31 20:55 UTCOSV refresh
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  6. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  9. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-25 16:14 UTCEG score recompute
  11. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-10-23 14:51 UTCEG score recompute
  14. 2026-10-23 14:51 UTCVendor advisory
  15. 2026-10-23 14:51 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  18. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-10-18 05:22 UTCEG score recompute
  21. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-16 16:39 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  24. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  25. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
Show 74 more
  1. 2026-10-12 16:52 UTCEG score recompute
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-11 20:27 UTCEG score recompute
  4. 2026-10-11 18:38 UTCEG score recompute
  5. 2026-10-11 15:13 UTCEG score recompute
  6. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-10-10 10:03 UTCOSV refresh
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  24. 2026-09-20 19:44 UTCOSV refresh
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  26. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  27. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  28. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  29. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  30. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  31. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  32. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  33. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  34. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  36. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  39. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  40. 2026-09-01 19:35 UTCOSV refresh
  41. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  43. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  44. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  45. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  46. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  47. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  48. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  49. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  53. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  54. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  56. 2026-08-15 21:07 UTCOSV refresh
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  59. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  61. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  62. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  64. 2026-08-07 16:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  67. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  68. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  69. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  70. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  71. 2026-07-31 14:25 UTCEG score recompute
  72. 2026-07-31 14:25 UTCVendor advisory
  73. 2026-07-31 14:25 UTCGHSA enrichmentGHSA-j5cc-6rx8-ff96 · GitHub CVSS 4.3
  74. 2026-07-31 14:09 UTCEG score recompute

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 (48th 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.

Dependency Blast Radius

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