When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
CVE-2025-11468
“—” beside the score: it is equal to NVD's CVSS score.
This medium-severity CVE scores 5.7 under NVD CVSS v3. EPSS exploit probability: 0.6% (49th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2025-206306 (ENISA EUVD) · GHSA-39h2-3mq3-959g (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 5.7
- EG Score
- 5.7MEDIUMmedium confidence
- EG Risk
- 26EG Risk 26/100
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)Severity57% × 45%Impact severity (EG Severity): CVSS 5.7 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
- 49th
- 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 (5.7): severity, escalated by confirmed exploitation. This CVE's 5.7 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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
January 20, 2026
Last Modified
June 17, 2026
Advisory Details (9)
Auto-updated Aug 8, 2026Mailman 3 [CVE-2025-11468] Folding email comments of unfoldable characters doesn't preserve parenthesis - Security-announce - python.org
https://mail.python.org/archives/list/security-announce@python.org/thread/FELSEOLBI2QR6YLG6Q7VYF7FWSGQTKLI/gh-143935: Email preserve parens when folding comments
Fix merged in python/cpython PR #143936 on 2026-01-19 — awaiting tagged release
https://github.com/python/cpython/pull/143936Fix folding of long comments of unfoldable characters in email headers · Issue #143935 · python/cpython · GitHub
https://github.com/python/cpython/issues/143935commit f73838683802 (python/cpython)
Fix landed in python/cpython commit f73838683802 — awaiting tagged release
https://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796commit e9970f077240 (python/cpython)
Fix landed in python/cpython commit e9970f077240 — awaiting tagged release
https://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0commit a76e4cd62dd6 (python/cpython)
Fix landed in python/cpython commit a76e4cd62dd6 — awaiting tagged release
https://github.com/python/cpython/commit/a76e4cd62dd68e7cbe86e37e6ed988495a646b66commit 61614a5e5056 (python/cpython)
Fix landed in python/cpython commit 61614a5e5056 — awaiting tagged release
https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6commit 17d1490aa97b (python/cpython)
Fix landed in python/cpython commit 17d1490aa97b — awaiting tagged release
https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2commit 003b8315669b (python/cpython)
Fix landed in python/cpython commit 003b8315669b — awaiting tagged release
https://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094Vendor Advisories for CVE-2025-11468(4)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:8824Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:8822Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:7661Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- RHSA-2026:7443Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Patch Availability(5)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3.8-venv (3.8.0-3ubuntu1~18.04.2+esm9) @ bionic | 2026-10-24 | ubuntu |
| redhat | python3-11-main-3.11.15-4.hum1 | 2026-04-17 | redhat |
| redhat | python3-12-main-3.12.13-3.hum1 | 2026-04-17 | redhat |
| redhat | python3-14-main-3.14.4-1.hum1 | 2026-04-11 | redhat |
| redhat | python3-13-main-3.13.13-1.hum1 | 2026-04-10 | redhat |
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
(9 across 4 ecosystems)
Debian:14(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 7.3.20+dfsg-3, 7.3.20+dfsg-4 |
| — |
| python3.13 | 3.13.11-1 ... 3.13.9-1 (6 versions) |
| — |
| python3.14 | 3.14.0-1 ... 3.14.2-1 (14 versions) |
| — |
Debian:11(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.10+dfsg-1 ... 7.3.9+dfsg-5 (53 versions) |
| — |
| python3.9 | 3.9.2-1, 3.9.2-1+deb11u1, 3.9.2-1+deb11u2, 3.9.2-1+deb11u3, 3.9.2-1+deb11u4 |
| — |
Debian:12(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.11+dfsg-2 ... 7.3.23+dfsg-1 (29 versions) |
| — |
| python3.11 | 3.11.2-6 ... 3.11.2-6+deb12u6 (7 versions) |
| — |
Debian:13(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions) |
| — |
| python3.13 | 3.13.5-2 |
| — |
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 7× 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 97 of 246 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 149 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-25 16:48 UTCEG score recompute
- 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-24 01:55 UTCEG score recompute
- 2026-10-24 01:55 UTCVendor advisory
- 2026-10-24 01:55 UTCGHSA enrichmentGHSA-39h2-3mq3-959g
- 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 05:51 UTCEG score recompute
- 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
Show 72 moreShow fewer
- 2026-10-12 17:26 UTCEG score recompute
- 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-11 20:56 UTCEG score recompute
- 2026-10-11 19:06 UTCEG score recompute
- 2026-10-11 15:47 UTCEG score recompute
- 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-08 20:25 UTCOSV refresh
- 2026-10-08 17:08 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-29 15:18 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-27 13:44 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-09-19 15:41 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-09-19 02:36 UTCOSV refresh
- 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-04 13:59 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-31 06:19 UTCOSV refresh
- 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-24 14:15 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-14 13:26 UTCEG score recompute
- 2026-08-14 13:26 UTCVendor advisory
- 2026-08-14 13:26 UTCGHSA enrichmentGHSA-39h2-3mq3-959g
- 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-09 19:07 UTCEG score recompute
- 2026-08-09 19:07 UTCVendor advisory
- 2026-08-09 19:07 UTCGHSA enrichmentGHSA-39h2-3mq3-959g
- 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-08 00:09 UTCEG score recompute
- 2026-08-08 00:09 UTCVendor advisory
- 2026-08-08 00:09 UTCGHSA enrichmentGHSA-39h2-3mq3-959g
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:14:python3.14
Same vendor
10 shownredhat:RHSA-2026:7443
Frequently asked(5)
What is CVE-2025-11468?
When was the CVE record for CVE-2025-11468 published?
Is CVE-2025-11468 actively exploited?
What is the CVSS score of CVE-2025-11468?
How do I remediate CVE-2025-11468?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-11468
Is Your Infrastructure Affected by CVE-2025-11468?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.