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CVE-2026-111943: Compromised Intermediate Certificate Authority

140 points keks24 2 hours ago 34 comments

imeron 2 hours ago | parent

It's down for me, are they on PHP? :D

tom1337 2 hours ago | parent

I'd assume hugged to death

ColinWright 2 hours ago | parent

Up for me, but slow to load.

keks24 2 hours ago | parent

Gentoo Linux users are adviced to update the package "app-misc/ca-certificates" to version "20260816.3.125" or higher!:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-misc/ca-certificates-20260816.3.125"
To check via "curl":

    $ curl --url="https://dv-g3b-emudhra.we-have-a-problem.com/"
    $ curl --url="https://dv-g3b-aaa-emudhra.we-have-a-problem.com/"
They should return:

    curl: (60) SSL certificate OpenSSL verify result: unable to get local issuer certificate (20)
    More details here: https://curl.se/docs/sslcerts.html

    curl failed to verify the legitimacy of the server and therefore could not
    establish a secure connection to it. To learn more about this situation and
    how to fix it, please visit the webpage mentioned above.
---

* GLSA 202610-01: https://security.gentoo.org/glsa/202610-01

* https://emudhra.we-have-a-problem.com/

asqueella 1 hour ago | parent

This seems to be about ‘go’ proactively blocking emudhra certs even though the system trust store is out of date? https://pkg.go.dev/vuln/GO-2026-6809

philipwhiuk 52 minutes ago | parent

"proactively" doing some work.

The problem is Golang has it's own trust store. So you don't benefit from OS patching.

sspiff 36 minutes ago | parent

That's not the case, Go uses the system store with an additional revoke/deny list in crypto/x509 because it allows updating a deployed application on an out of date or slow moving platform or OS.

This CVE is literally just "versions of the Go deny list don't contain the eMuhdra revokation yet". Older versions of Go will still deny certs signed through the compromised certificate if the system store already has the update.

It's an or situation, not and.

zkmon 1 hour ago | parent

Great. The technology has progressed enough to kill the existing technologies. It's like the fish in a pool creating a shark that eats away all the fish while the fish proudly announce that their great creation (shark) as the frontier progress for their fish race.

colinmarc 1 hour ago | parent

The eMudhra CA compromises had nothing to do with LLMs? But I love the vibes.

prodigycorp 39 minutes ago | parent

Agents have dramatically increased the ability to poke at every single surface out there. I would be surprised if the researcher who found this wasn't assisted by a llm.

cedilla 1 hour ago | parent

Here a CA derived a secret key from the number 4.

If you think "that's weird to see such a small number in key generation" than you're one step ahead of whoever generated that key.

Unfortunately, unlike with RSA, small primes are not apparent in elliptic cryptography.

wiredfool 41 minutes ago | parent

Nor small composites, apparently.

jkahrs595 10 minutes ago | parent

> Here a CA derived a secret key from the number 4

https://xkcd.com/221/

RazorX 1 hour ago | parent

This is basically the whole idea of the novel War with the Newts

palata 44 minutes ago | parent

> It's like the fish in a pool creating a shark

What a weird comparison...

colinmarc 1 hour ago | parent

TL;DR:

The very urgent uv/certifi/etc releases (and yet-to-be-done bun release) are about removing the compromised CAs as described here:

https://emudhra.we-have-a-problem.com/

In other words, that software bundled the compromised certs into the binary, so upgrading it is the only way to remove them.

This is about Go proactively blocking intermediates. Which shouldn't strictly be necessary as long as your OS has removed or distrusted the CAs (on my laptop, macOS has done that, although it seems like it did so in a way not all tools have access to; for example, rustls-platform-verifier respects it, but rustls-webpki still loads the bad CAs from the system trust store).

edit: forgot I can't use code blocks on HN

t_mahmood 1 hour ago | parent

> edit: forgot I can't use code blocks on HN

  You can, two space at the start of each line

fabioborellini 1 hour ago | parent

I wonder if they made this change with an assumption that the root CAs wouldn't be distrusted later same day, too.

speedgoose 1 hour ago | parent

Cock-up or conspiracy?

dspillett 9 minutes ago | parent

Any sufficiently advanced stupidity is indistinguishable from malice.

dathinab 1 hour ago | parent

It's a bit surprising that this took ~1.5days to end up on HN.

vultour 1 hour ago | parent

It was here yesterday, this is just another good opportunity to farm some points.

darkwater 1 hour ago | parent

This is news for NIST but old news generally speaking, being the eMudhra debacle. Or am I missing something?

ale42 1 hour ago | parent

It's the Go version of it, I think.

colinmarc 1 hour ago | parent

Go is not vulnerable in the same way software using webpki is, because it generally uses the system trust store. However, this change is about golang proactively blocking the certs, so that even if your OS doesn't update, it still won't trust them.

https://github.com/golang/go/issues/82345

darkwater 1 hour ago | parent

But the Go version is as well old news, actually it was one of the first stories about eMudhra appearing on the HN homepage yesterday.

alt227 1 hour ago | parent

Im guessing this only affects Go? But I am guessing that from the nist page as none of the headlines mention it at all.

grey-area 50 minutes ago | parent

No it affects everybody, but most browsers/OSs etc have updated already. This is just a workaround Go put in case the underlying OS has not been updated. Not sure why it is on the front page as it duplicates previous posts and confuses people, I think it should be merged.

Here is the original story: https://news.ycombinator.com/item?id=50166579

alt227 26 minutes ago | parent

Thanks for clarifying

contingencies 32 minutes ago | parent

Fix for OSX - put this in ~/.zshrc:

  export CURL_CA_BUNDLE="$(brew --prefix)/etc/ca-certificates/cert.pem"
To verify, log in to a new shell and run

  curl https://dv-g3b-emudhra.we-have-a-problem.com/

charlieyu1 4 minutes ago | parent

We are in the era of 6 digit CVE now